Synonyms of valid

Adjective

1. valid (vs. invalid), binding, legal, sound, effectual, legitimate, logical, reasoned, sound, well-grounded, validated, legitimate, reasonable#1, sensible

usage: well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract"

2. valid, unexpired (vs. expired)

usage: still legally acceptable; "the license is still valid"

Definition and meaning of valid (Dictionary)