How to Sign "On" in American Sign Language (ASL)

Place your dominant hand's index and middle fingers in a horizontal "V" shape and put them on your flat palm. The sign shows how objects sit on top of things, just like when you put a book on a table or a cup on a desk. You can change this sign a bit when talking about turning on lights or machines by adding a quick flicking motion. The sign becomes different for "on time," where you just use one finger to point at a spot on your other hand's finger. This basic sign helps people talk about where things are and what state they're in.