Noun

• S: (n) invalid, shut-in (someone who is incapacitated by a chronic illness or injury)

Verb

• S: (v) invalid (force to retire, remove from active duty, as of firemen)
• S: (v) disable, invalid, incapacitate, handicap (injure permanently) "He was disabled in a car accident"

Adjective

• S: (adj) invalid (having no cogency or legal force) "invalid reasoning"; "an invalid driver's license"
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• W: (adj) valid [Opposed to: invalid] (well grounded in logic or truth or having legal force) "a valid inference"; "a valid argument"; "a valid contract"
• antonym
• derivationally related form
• W: (n) validness (the quality of having legal force or effectiveness)
• W: (n) validity (the quality of being valid and rigorous)
• Overview
• S: (adj) valid (well grounded in logic or truth or having legal force) "a valid inference"; "a valid argument"; "a valid contract"
• S: (adj) valid (still legally acceptable) "the license is still valid"
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• derivationally related form
• S: (adj) invalid (no longer valid) "the license is invalid"
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