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Dictionary definition for: Invalid

1. (n) someone who is incapacitated by a chronic illness or injury

2. (v) force to retire, remove from active duty, as of firemen

3. (a) having no cogency or legal force; "invalid reasoning" "an invalid driver''s license"

4. (v) injure permanently; "He was disabled in a car accident"

5. (s) no longer valid; "the license is invalid"

WordNet 2.1 Copyright Princeton University. All rights reserved.