1. [Adjective]: having no cogency or legal force; "invalid reasoning"; "an invalid driver''s license"

2. [Noun]: someone who is incapacitated by a chronic illness or injury

3. no longer valid; "the license is invalid"

4. [Verb]: injure permanently; "He was disabled in a car accident"

5. [Verb]: force to retire, remove from active duty, as of firemen

Similar words to 'invalid'

Opposite words to 'invalid'

Try another search!

Look up words in the English4.Today Online Dictionary and add them to your own personal dictionary for vocabulary practice.

All you need to start your own personal dictionary web is a free English4.Today membership. Podcasts

Get immediate access to grammar tests, quizzes, exercises, pronuciation practice, vocabulary building, courses, and an online community all wanting to improve their English and help you improve yours! Standard membership is FREE!!