- valid - well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract"; "a valid license"
Antonyms: invalid, bad, uncollectible, fallacious, unsound, false, invalidated, nullified, null, void, sophistic, sophistical, specious, spurious
- valid - still legally acceptable; "the license is still valid"
Antonym: expired (indirect, via unexpired)