invalid

in-val-id · adjective

imported

Definitions

adjective

  1. 1.

    Not legally or officially acceptable.

  2. 2.

    Not based on sound reasoning; logically flawed.

  3. 3.

    (Computing) Not conforming to required format or rules.

  4. 4.

    As noun (pronounced /ˈɪnvəlɪd/): a person made weak or disabled by illness or injury.

Related words

Antonyms: legal, legitimate, valid
See also: invalidate, valid, void
Synonyms: illegitimate, null, void

Etymology

From Latin invalidus "not strong," from in- "not" + validus "strong."