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invalid

adjective, noun

/ˈɪnvəlɪd/ (adjective), /ɪnˈvælɪd/ (noun)

Meaning

Not valid; having no force or effect. Also refers to a person too weak or ill to care for themselves.

The court declared the contract invalid.

invalid argument

void, ineffective, worthless, weak, ill

valid, sound, effective

invalid contract, invalid data, invalid reason

Relating to dogs; also refers to the pointed teeth in humans and animals

Relating to the intellect; a person who engages in critical thinking and study.

Involving trust, especially with regard to the relationship between a trustee and a beneficiary.

relating to young people; childish or immature

abstaining from marriage and sexual relations; a person who does so

more near in distance or relationship; someone or something that concludes an activity