How do yo say hi in sign language?

There isn't a single universal sign for "hi" in sign language. It varies depending on the specific sign language you're using.

Here are some examples:

* American Sign Language (ASL): The most common sign for "hello" in ASL is a wave-like motion with the dominant hand, starting at the forehead and moving out in a sweeping arc.

* British Sign Language (BSL): In BSL, the sign for "hello" is made by touching the chin with the index finger of the dominant hand and then moving it away from the face.

* Australian Sign Language (Auslan): The sign for "hello" in Auslan involves touching the chin with the index finger and then moving it in a circular motion.

Important Note: It's crucial to learn the correct sign from a qualified teacher or resource for the specific sign language you're interested in. Using the wrong sign can lead to misunderstandings or be considered disrespectful.