Invalid - Definition

adj 1: having no cogency or legal force; "invalid reasoning";
"an invalid driver's license" [ant: valid]
2: no longer valid; "the license is invalid"
n 1: someone who is incapacitated by a chronic illness or injury
[syn: invalid, shut-in]
v 1: force to retire, remove from active duty, as of firemen
2: injure permanently; "He was disabled in a car accident" [syn:
disable, invalid, incapacitate, handicap]