invalid

Reading level: hard

Estimated CEFR level: B2 — Upper-Intermediate

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun someone who is incapacitated by a chronic illness or injury
  2. verb force to retire, remove from active duty, as of firemen
  3. verb injure permanently

Etymology

From in- + valid.

In classic literature

Synonyms

shut-in

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