invalid

Adjective

Pronunciation

• enPR: ĭn-vă'lĭd, IPA: /ɪnˈvæ.lɪd/, SAMPA: /In"v{.lId/
•  Audio (US)^{help, file}

Positive invalid

Comparative none

Superlative none

1. Something that is invalid is not valid, meaning it is not correct, appropriate, or acceptable.

   I learned that my credit card was invalid when I tried to pay for dinner with it.

Noun

Pronounciation

• enPR: ĭn'və-lĭd, IPA: /ˈɪn.və.lɪd/, SAMPA: /"In.v@.lId/
•  Audio (US)^{help, file}

Singular invalid

Plural invalids

1. Someone who is very sick, often to the point of having to stay in bed or a wheelchair all the time.

   George Chaffey's invalid wife had to use a wheelchair for the last ten years of her life