Meaning

5 senses
  1. (dialectal, informal, nonstandard)Am not.

    I ain’t ready yet; gimme a sec.

    Ain’t I a woman?

  2. (dialectal, informal, nonstandard)Are not, aren’t; is not, isn’t.

    That ain't right.

  3. (dialectal, informal, nonstandard)Have not, haven’t; has not, hasn’t, when used as an auxiliary.

  4. (dialectal, informal, nonstandard)Don’t, doesn’t.

    Well, I ain’t wanna do that though.

  5. (dialectal, informal, nonstandard)Didn’t.

    I ain’t go into the bathroom last night that late.

Origin

According to Etymology Online, the term was first attested in 1706 meaning am not, and it

According to Etymology Online, the term was first attested in 1706 meaning am not, and it was used with that sense until the early 19th century, when it began to be used as a generic contraction for are not, is not, etc. in the Cockney dialect. It was then “popularized by representations of London cockney dialect in Dickens, etc., which led to the word being banished […] from correct English”.

Wiktionary, CC BY-SA 4.0 · source

Forms

ain'ts, ain'ting, ain'ted, ain'ted
Base formain't · to ain't
3rd person singularain'ts
Present participleain'ting
Past simpleain'ted
Past participleain'ted

regular

Present simpleLesson

I, you, we, theyain't
he, she, itain'ts

Past simpleLesson

all personsain'ted

Present perfectLesson

I, you, we, theyhave ain'ted
he, she, ithas ain'ted

Future simple (will)Lesson

all personswill ain't

Synonyms

4 synonyms
am not:amn'tan't
have not, has not:hain'than't

See also

neighbours in the dictionary
ain't — meaning, examples, forms, synonyms | Krumeto