invalid
adjective
1. having no cogency or legal force
- invalid reasoning
- an invalid driver's license
Similar word(s): illegitimate, bad, uncollectible, fallacious, unsound, false, spurious, invalidated, nullified, null, void, sophistic, sophistical
2. no longer valid
- the license is invalid
Similar word(s): expired
Sentences with invalid as an adjective:
- Your argument is invalid because it uses circular reasoning.
- This invalid contract cannot be legally enforced.
noun
1. someone who is incapacitated by a chronic illness or injury