Definition: State or describe exactly the nature, scope, or meaning of; the idea that a person wants to express by using words, signs, etc.
How to ask a Deaf ASL-speaking person what ASL sign means in American Sign Language? Glossed as [ASL sign]/\ MEAN WHAT?
First 100 words.
As you feel more comfortable with the first few hundreds of ASL signs, progress further with your vocabulary and learn signing more.