Understand in Sign Language (ASL)

ASL Dictionary 3 min read

How to sign Understand in ASL
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The sign for “understand” is an essential part of everyday conversation in ASL. It is used to express comprehension or acknowledgment of information shared by others. This sign is commonly used in various contexts, whether in casual dialogue or more serious discussions, making it a fundamental element of effective communication.

Last reviewed: March 15, 2026

Frequently Asked Questions

How do I use the sign ‘understand’ in sentences?

You can use the sign ‘understand’ to affirm comprehension during conversations. For example, if someone explains something to you, you can sign ‘I understand’ by placing your ‘baby o’ handshape on your forehead and moving it slightly away, reinforcing that you’ve grasped the information.

Are there regional variations of the sign ‘understand’?

Yes, regional variations in ASL can exist, influenced by local Deaf communities. While the basic sign for ‘understand’ remains similar, you might observe slight differences in handshape or movement depending on the region.

Is there a difference between formal and informal usage of the sign ‘understand’?

The sign ‘understand’ is versatile and can be used in both formal and informal contexts. In professional settings, it may be accompanied by more deliberate facial expressions to convey seriousness, while in casual conversations, a more relaxed approach can be used.

What are some similar or easily confused signs related to ‘understand’?

The signs for ‘know’ and ‘understand’ can sometimes be confused because they both relate to comprehension. However, ‘know’ uses a different handshape and movement, so paying attention to context and hand positioning is key to avoiding misunderstandings.

How does the sign for ‘understand’ compare to British Sign Language (BSL)?

In BSL, the sign for ‘understand’ is quite different from ASL. BSL uses a ‘flat hand’ shape moving in front of the forehead, so it’s important for ASL learners to recognize these differences when communicating with BSL users.

What are some effective teaching tips for the sign ‘understand’?

When teaching the sign ‘understand’, demonstrate it in various contexts and encourage students to practice in pairs. Incorporating role-play scenarios can also help learners grasp how to use the sign naturally in conversation, reinforcing its meaning through real-life application.

Table of Contents

Sign at a Glance

Type Verb
Sign Type One-Handed
Location Head
Handshape baby_o
Movement None
Iconicity Moderately Iconic (4.633/7) — Both
Frequency Very Common (6.1/7)
Age of Acquisition Preschool (3-4 years) (~40 months)
Semantic Category Event
ASL Signbank View sign video →

Data: ASL-LEX 2.0 · ASL Signbank (Caselli et al., 2017)

How to Sign “Understand”

  1. Start with your dominant hand in a “baby o” handshape, which means your fingers form a small ‘o’ while your thumb is extended.
  2. Position your hand at your forehead, with the palm facing inward towards your head.
  3. Keep your arm relaxed and still; there’s no movement required for this sign.
  4. Maintain a neutral facial expression or nod slightly to indicate understanding as you sign.

Common Mistakes

  • Some learners may confuse the handshape by using a flat hand instead of the correct “baby o” shape.
  • Not positioning the hand correctly at the forehead can lead to unclear communication.
  • Forgetting to incorporate appropriate facial expressions, which can help convey the meaning of the sign.
  • A – The letter A in ASL, often used in fingerspelling.
  • A Little Bit – A sign indicating a small amount or slight understanding.
  • Abbreviate – To shorten or make brief, useful in discussions about understanding concepts quickly.
  • 5 Dollars – A common sign for monetary value, sometimes relevant in discussions about understanding financial topics.

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