invalid

Word parts

in- + valid

Pronunciation

adjective

• enPR: ĭn-vă'lĭd, IPA ^(key): /ɪnˈvæ.lɪd/, SAMPA: /In"v{.lId/

• Audio (US)

  (file)

noun

• enPR: ĭn'və-lĭd, IPA ^(key): /ˈɪn.və.lɪd/, SAMPA: /"In.v@.lId/

• Audio (US)

  (file)

Adjective

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

Singular invalid

Plural invalids

1. Someone who is invalid 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

Related words

• invalidity