The Collaborative International Dictionary of English v.0.48:

ASL \ASL\ n.
   same as American sign language, the sign language used in
   the US.

   Syn: American sign language, AMESLAN
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

ASL
    n 1: the sign language used in the United States [syn: ASL,
         American sign language]

The Free On-line Dictionary of Computing (19 January 2023):

ASL

   1.  Algebraic Specification Language.

   2.  A rather gruff way of asking someone their age, sex,
   and location.

   (2008-01-21)