- not valid; without force or foundation; indefensible.
- deficient in substance or cogency; weak.
- void or without legal force, as a contract.
Origin of invalid2
- a person suffering from disablement or chronic ill health
- (as modifier)an invalid chair
- suffering from or disabled by injury, sickness, etc
- to cause to become an invalid; disable
- (usually foll by out; often passive) mainly British to require (a member of the armed forces) to retire from active service through wounds or illness
- not valid; having no cogency or legal force
- logic (of an argument) having a conclusion that does not follow from the premises: it may be false when the premises are all true; not valid
Word Origin and History for invalidly
1709, originally of disabled military men, from invalid (adj.1). Invalides is short for French Hôtel des Invalides, home for old and disabled soldiers in the 7th arrondissement of Paris.
"of no legal force," 1630s, from special use of Latin invalidus (see invalid (adj.1)).
- One who is incapacitated by a chronic illness or disability.
- Incapacitated by illness or injury.