The definition of ain't is slang for the phrases am not, is not, are not and have not.
If someone accuses you of being stupid and you want to protest the accusation, this is an example of when you might say "I ain't stupid."
- Informal am not
- : a dialectal or nonstandard usage: you ain't seen nothing yet!
- is not or are not
- has not or have not
Origin of ain'tearly assimilation, with lengthened and raised vowel, of amn't, contr. of am not; later confused with a'nt (are not), i'nt (is not), ha'nt (has not, have not)
- Contraction of am not.
- Used also as a contraction for are not, is not, has not, and have not.
- From the earlier form an't, a contraction of am not, are not, and is not. The shift from IPA: /ænt/ to IPA: /eɪnt/ parallels a similar change in some dialects with can't. In other dialects the pronunciation shifted to IPA: /ɑːnt/, and the spelling aren't, when used to mean “am not”, is due to the fact that both words are pronounced IPA: /ɑːnt/ in some non-rhotic dialects. Historically, ain't was present in many dialects of the English language, but not in the southeastern England dialect that became the standard, where it is only found in the construction aren't I?.
- From the earlier form han't, a contraction of has not and have not. Han't shifted from IPA: /hænt/ to IPA: /heɪnt/, and underwent h-dropping in most dialects.