Sign language has five basic parameters.
These parameters are the building blocks of sign language. They include handshape, movement, location, palm orientation, and non-manual markers.
Handshapes play a key role in American Sign Language (ASL). They help distinguish different signs, and they're necessary for forming classifiers.
ASL classifiers are handshapes that can represent objects, people, and actions. A person can also use classifiers to describe scenes and actions.
There are different types of classifiers, each with a specific purpose. Some describe objects, while others show how something moves.
Classifiers make ASL more visual and dynamic, helping signers communicate with clarity. Understanding them is key to fluency in ASL.
What Are ASL Classifiers?
American Sign Language (ASL) relies on handshapes, movement, and facial expressions to convey meaning.
One of the most important aspects of ASL is classifiers.
ASL classifiers are specific handshapes used to represent different concepts. These may include:
- People and their movements
- Objects and their shapes and sizes
- Actions and interactions
- Vehicles and transportation
- Body parts and their movements
- Groups of people or objects
- Location and spatial relationships

Classifiers in ASL help signers describe size, shape, movement, and location efficiently.
Instead of signing out every detail, a signer can use classifiers to show how something looks or moves.
For example, a "V" handshape can represent two people walking. A bent "L" can show a round object, while a "3" handshape can be a car.
These classifiers are key for clear and expressive communication in ASL.
They allow signers to create detailed descriptions and narratives. They don't have to rely on fingerspelling or standard signs alone.
Learning classifiers can improve fluency. It also helps signers communicate complex ideas visually.
The Core Types of ASL Classifiers
ASL classifiers are divided into different types. Each serves a specific purpose in communication.
These are the core types of ASL classifiers:
- Semantic classifiers
- Descriptive classifiers
- Instrument classifiers
- Element classifiers
- Locative classifiers
- Body part classifiers
- Plural classifiers

Each of these classifiers plays a crucial role in ASL.
They make communication more expressive, clear, and efficient.
Semantic Classifiers
Semantic classifiers represent a category of nouns. These classifiers often depict people, animals, or vehicles in action.
In other words, they show how they move or interact with other objects.
Semantic classifiers provide a way to visually describe movement, direction, and interaction.
This defeats the purpose of using different signs to convey one meaning.
For example, a "V" handshape can represent two people walking, sitting, or falling.
Descriptive Classifiers
Descriptive classifiers provide details about an object's shape, size, texture, or pattern.
As the name suggests, they help visually describe the characteristics of an object or person.
These classifiers are important for providing rich, visual descriptions. They can also be used to set up a scene.
A "C" handshape can represent a cylindrical object like a cup.
A flat "B" handshape can represent a flat, smooth surface. For example, a book or a table.
Descriptive classifiers are very important for storytelling and detailed explanations.
Instrument Classifiers
Instrument classifiers show how an object is handled or used.
This classifier mimics the grip, movement, and interaction of a person using an object. It provides context about the way something is held or manipulated.
Here are some examples:
- Holding an imaginary steering wheel to show driving a car
- Representing the act of using scissors by opening and closing the fingers
- Gripping an imaginary hammer and making a pounding motion
Element Classifiers
Element classifiers represent natural elements and forces, such as air, water, fire, and light.
They help describe how these elements move, interact, and affect their surroundings.
These classifiers add a realistic and dynamic visual effect to signing.
Here are some examples of how to use element classifiers:
- Air/wind: Wiggling fingers moving outward to show a breeze or strong wind blowing
- Water: Using a 5-handshape with fingers waving downward to represent rain falling
- Fire: A clawed 5-handshape with upward movement to show flames flickering or growing
- Light: A quick opening movement of the fingers to indicate a light turning on or flashing
Locative Classifiers
Locative classifiers indicate where something is positioned or how it moves in space.
They show placement, movement, and spatial relationships between objects.
Here are some examples of locative classifiers:
- A flat "B" handshape can represent a book sitting on a table
- A small "O" handshape moving downward can represent a coin dropping
- Two "b" or "5" handshapes facing each other can indicate a box sitting on a shelf
Body Part Classifiers
Body part classifiers represent specific parts of the body in action.
Instead of pointing to the actual body part, signers use classifiers to describe movement, position, or interaction.
Body part classifiers help act out actions. They make descriptions more realistic.
Here are some examples of body part classifiers:
- Using an index finger to represent a leg and moving it to show walking
- Tapping fingers on the palm to show footsteps or walking
- Clenching a fist near the shoulder to indicate a bent arm
Plural Classifiers
Plural classifiers represent multiple objects, people, or repeated actions.
They show quantity, grouping, or repeated motion without the need for extra signs.
Here's how you can use plural classifiers:
- Wiggle fingers to indicate a large crowd of people
- Repeat the same classifier in different locations to show several objects placed around a room.
- Move a "4" classifier several times to show many people walking
- Use both hands in a curved "5" shape to represent waves moving in the ocean
Specific ASL Classifiers and Their Functions
Each classifier has a unique function, helping signers describe things visually and efficiently.
These are some common specific ASL classifiers:
- CL:1
- CL:3
- CL:4
- CL:B
- CL:C
- CL:S
- CL:X
- CL:Y

CL:1
The CL:1 is the "thin or upright object" classifier.
You can form it by extending one index finger while the other fingers remain closed.
The CL:1 classifier is used to:
- Represent a single person standing or walking
- Describe thin, long objects like a pole, pencil, or string
- Show movement, like a person walking in a straight line or turning
CL:3
The CL:3 is the vehicle classifier.
It's formed by extending your thumb, index, and middle fingers, while the other fingers remain closed.
You can use the CL:3 classifier to:
- Represent vehicles like cars, buses, boats, or motorcycles
- Show movement and direction of vehicles
- Indicate accidents or crashes by colliding CL:3 handshapes
CL:4
The CL:4 is the "line or group" classifier.
You can form this classifier by extending your four fingers together and tucking your thumb in.
This classifier is ideal for:
- Creating parallel lines (such as stripes, rain, or hair)
- Showing rows of people, objects, or seats
- Indicating flowing movement (such as a river or tears running down)
CL:B
The CL:B is the "flat surface" classifier.
To form the CL:B classifier, form a flat hand with fingers extended together.
This classifier:
- Represents flat objects like tables, books, floors, or paper
- Indicates barriers or surfaces
- Can be used for describing placement (e.g., a book lying on a table)
CL:C
The CL:C is the "round or thick object" classifier.
Your fingers should form a "C" shape with your thumb and fingers curved to use this classifier.
The CL:C classifier can:
- Represent cylindrical or round objects like a cup, bottle, or thick rope.
- Indicate the thickness or width of an object
- Be used for grasping motions
CL:S
The CL:S classifier is the "solid or fist-shaped object" classifier.
Close your fist to use this classifier, similar to the letter S in ASL.
This classifier can:
- Represent solid, compact objects (e.g., rocks, a ball, or a fist)
- Show gripping or holding movements
- Indicate forceful motion, such as punching or throwing
CL:X
The CL:X classifier represents bent objects or small parts.
To use this classifier, bend your index finger, keeping the other fingers closed.
The CL:X classifier can:
- Represent small, curved objects (e.g., hooks, claws, or fangs)
- Be used for describing gripping
CL:Y
The CL:Y classifier is the "liquid or wavy object" classifier.
To use this classifier, extend your thumb and pinky and fold your other fingers (like the ASL letter "Y").
The CL:Y classifier can:
- Represent liquids or flowing substances (e.g., water, milk)
- Indicate wavy motion (such as hair blowing in the wind)
- Be used for pouring or dripping
Classifier Handshape Categories and Movements
ASL classifiers rely on both handshape and movement to convey meaning.
The way a classifier moves or changes position adds important details to the message.
This is where morphemes come in. They refer to the smallest meaningful units of movement or shape within classifiers that contribute to the overall meaning of a sign.
Below are three key morpheme categories that influence how classifiers are used in ASL:
- Location morphemes
- Motion and manner morphemes
- Extension morpheme

Location Morphemes
Location morphemes determine where an object, person, or action is placed in space.
You can use these morphemes to:
- Indicate where something is located in relation to another object
- Show the height, distance, or depth of an object
- Describe position changes (e.g., something moving from one location to another)
Location morphemes help create a clear spatial map in ASL, making the conversation more visually precise.
These are some examples:
- Using CL:B (flat hand) at chest level to show a table and moving it outside to indicate a shelf
- Placing CL:1 (upright index finger) on one side of the signing space and then moving it forward to show a person approaching
- Using CL:3 (vehicle classifier) to describe a car parked near a house versus far away
Motion and Manner Morphemes
These morphemes describe how something moves (motion) and the way it moves (manner).
They help show speed, direction, smoothness, or hesitation in movement.
You can use motion and manner morphemes to:
- Indicate the speed of movement (fast, slow, abrupt)
- Show the direction of movement (straight, curved, zigzag)
- Describe the manner of movement (smooth, jerky, hesitant)
Motion and manner morphemes allow for detailed and expressive storytelling, making ASL more dynamic and engaging.
Here are some examples:
- Moving CL:3 (vehicle) forward in a fast motion to indicate a speeding car
- Using a zigzagging movement with CL:1 to represent a person weaving through a crowd
- Showing a ball rolling smoothly with CL:C and then stopping abruptly to indicate a sudden halt
Extension Morphemes
These morphemes show changes in size, length, or shape over time. They indicate how an object expands, shrinks, stretches, or transforms.
They're used to:
- Represent objects growing or shrinking.
- Show expansion or contraction of something over time.
- Indicate stretching, spreading, or folding of objects.
Extension morphemes help signers express changes in size and shape, making ASL more visually accurate.
Here are ways extension morphemes are used:
- Expanding CL:C outward to show a balloon inflating.
- Stretching CL:B outward to indicate a table being extended.
How Would You Use Classifiers in ASL?
ASL classifiers are essential tools for clear, visual communication.
To use them effectively, signers must practice identifying, forming, and applying classifiers in various contexts.
Below are some key strategies for applying and improving classifier skills.
- Identifying classifiers in everyday conversations
- Practicing classifier transitions in sentences
- Using classifiers for storytelling and narratives
- Applying classifiers in conversations and everyday descriptions
- Engaging in interactive classifier drills
Practicing ASL classifiers through conversation and drills helps signers improve fluency and expressiveness.
The more you use classifiers in daily signing, the better your ASL communication skills will become.
Learning American Sign Language Classifiers
ASL classifiers are a fundamental part of American Sign Language. They allow signers to create clear, dynamic, and visual representations of people, objects, and actions.
By using specific handshapes and movements, classifiers make ASL more efficient and expressive. They reduce the need for excessive signs or fingerspelling.
If you need help learning ASL, try installing ASL Bloom.

ASL Bloom offers a fun and easy way to learn American Sign Language. Not only will you be learning useful signs, but other aspects of sign language as well, including ASL classifiers.
With quizzes, flashcards, video instructions, and a dictionary, you'll be able to learn ASL in no time.
You can install our app on your iPhone or Android device. Happy signing!
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