The Truth in Sign Language: How to Sign "Truth" and "Tell the Truth" in ASL

The short answer

In American Sign Language (ASL), "truth" is usually expressed with the sign often glossed as TRUE. It also covers "real," "really" and "actually," depending on context. Extend your index finger, start with it at your chin or just in front of your lips, and move it forward and slightly away from your mouth in a short, smooth path. To say "tell the truth," signers commonly combine TRUE with the sign TELL, or use the sign HONEST, with a facial expression that fits the situation.

One detail can change this answer completely: which sign language you mean. Sign languages are not universal. The description here is for ASL, which is used in the United States and parts of Canada. British Sign Language, Auslan and other sign languages use different signs for the same idea. If you are signing with someone outside ASL, ask which language they use.

A note on sources

No verified dictionary entries, videos or other source material were supplied for this article. The sign descriptions below reflect widely taught ASL forms, but signs vary by region, community and individual signer. Written descriptions also can't fully capture movement. Before you rely on these signs, compare them with a video from a reputable ASL dictionary or check them with a fluent Deaf signer.

How to sign TRUE / TRUTH

• Use your dominant hand. Extend your index finger and fold the other fingers, with your thumb resting over them.
• Hold the finger pointing upward. For a right-handed signer, the palm side generally faces left, so the side of the finger is toward your mouth.
• Start with the hand at your chin or just in front of your lips.
• Move the hand forward, away from your mouth, in one short, deliberate motion.
• Keep your face engaged. A neutral, sincere expression fits a simple statement. Raised or furrowed brows can turn it into a question, such as "Really?" or "Is that true?"

Some signers start with the finger held more sideways along the chin rather than upright. Both forms are common. Signers also use the same sign to emphasize a statement, as in "I really did."

How to sign "tell the truth"

ASL does not translate English word by word, so there is no single fixed sign for the phrase. These are common ways to express it:

• TRUE + TELL: sign TRUE, then sign TELL. For TELL, the index finger starts near the chin and moves forward toward the person being told.
• HONEST: the dominant hand, with index and middle fingers extended together, slides forward along the flat palm of the other hand. This works well when you mean "be honest."
• TELL-me + TRUE: in a request like "tell me the truth," TELL moves toward yourself instead of outward.

TELL is a directional verb: its movement shows who is telling whom. Moving it toward the other person means "I tell you." Moving it toward yourself means "you tell me." Using the wrong direction changes who is speaking to whom, so check it when you practice.

Facial expression and posture carry grammar in ASL. A firm request such as "Tell the truth!" usually comes with direct eye contact and a serious expression, often with a slight lean forward. A gentle request uses a softer face. The hand shapes stay the same, but the meaning shifts.

Checking your signing on camera

Both TRUE and TELL start at the chin, so the person watching must see your face and hands together. If you plan to use these signs on a video call or in a recording, check these points first:

• Framing: show everything from just above your head to around your waist, with room on both sides for your hands. A close-up of only your face will cut off the movement.
• Lighting: put the main light in front of you, not behind you. A bright window behind you can turn your hands and face into a silhouette.
• Background: a plain physical background that contrasts with your skin and clothing makes hand shapes easier to read.
• Virtual effects: background blur and virtual backgrounds can smear or erase fingers during movement. For signing, a real plain background is usually more reliable than a software effect.
• Mirrored preview: many video apps show your self-view mirrored, so your right hand appears on the left of the screen. The other person typically sees the unmirrored image. Don't change your signing to match the preview.

A camera that appears in your browser or app and shows a live preview only confirms access and capture. It does not show how clear your signing will look to the other person. Calls can compress fast hand movement or lower quality on weak connections. To check what others see, make a short test recording and play it back, or ask your call partner whether your hand shapes and facial expressions come through clearly.

Next steps

Practice TRUE and TELL slowly in front of your camera, then compare your recording with a video from an established ASL dictionary. For anything important, such as communicating with a Deaf family member, colleague or client, ask a fluent signer for feedback. They can confirm the local variant and whether your facial expression matches what you mean.