D defs.my
Entry 1 sense Webster, 1913

Ain't

/ānt/ · IPA /eɪnt/
01 A contraction for are not and am not; also used for is not. [Colloq. or illiterate speech]. See An't.
  1. 1.
    A contraction for are not and am not; also used for is not. [Colloq. or illiterate speech]. See An't.[Colloq. or illiterate speech] See: An't