Etymology
Advertisement

invalid (adj.1)

"not strong, infirm," also "infirm from sickness, disease, or injury", 1640s, from Latin invalidus "not strong, infirm, impotent, feeble, inadequate," from in- "not" (see in- (1)) + validus "strong" (from PIE root *wal- "to be strong"). With pronunciation from French invalide (16c.).

invalid (n.)

"infirm or sickly person," 1709, originally of disabled military men, from invalid (adj.1). In Paris, Invalides is short for Hôtel des Invalides, home for old and disabled soldiers in the 7th arrondissement of Paris.

invalid (adj.2)

"of no legal force," 1630s, from special use of Latin invalidus "not strong, infirm, impotent, feeble, inadequate," from in- "not" (see in- (1)) + validus "strong" (from PIE root *wal- "to be strong").

Others are reading

Advertisement
Advertisement
Definitions of invalid
1
invalid (v.)
force to retire, remove from active duty, as of firemen;
invalid (v.)
injure permanently;
2
invalid (adj.)
having no cogency or legal force;
an invalid driver's license
invalid reasoning
invalid (adj.)
no longer valid;
the license is invalid
3
invalid (n.)
someone who is incapacitated by a chronic illness or injury;
Synonyms: shut-in
From wordnet.princeton.edu