adjective

1. being such practically or in effect, although not in actual fact or name a virtual impossibility
2. Comput.
   1. designating or of a kind of memory (sense 8b) that makes use of disk space to supplement main memory while large programs are being executed
   2. of, pertaining to, or taking place in cyberspace or in virtual reality virtual shopping

Etymology: ME vertual < ML virtualis < L virtus, strength, virtue