[Din Maker]

To answer your question: Yes, "ain't" is a contraction. Of what????? Maybe this will help.

ain't (Pronounced /eɪnt/)

Contracton for: am not, is not, are not, have not, or has not: I ain't seen it

ORIGIN: 1706. originally a contraction of "am not" (amn't) and in proper use with that sense until it began to be used as a generic contraction for are not, is not, etc., in early 19c. Cockney dialect of London; popularized by representations of this in Dickens, etc., which led to the word being banished from correct English.

[867V309]

To answer your question: Yes, "ain't" is a contraction. Of what????? Maybe this will help.

ain't (Pronounced /e?nt/)

Contracton for: am not, is not, are not, have not, or has not: I ain't seen it

ORIGIN: 1706. originally a contraction of "am not" (amn't) and in proper use with that sense until it began to be used as a generic contraction for are not, is not, etc., in early 19c. Cockney dialect of London; popularized by representations of this in Dickens, etc., which led to the word being banished from correct English.

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Pretty sure ain't is a contraction for ain not.