Is ain’t a word?
Yes, ain’t is a word. “Ain’t” is an informal contraction for “is not,” “are not,” “am not,” “do not,” “does not,” “have not” or “has not.” Like double negatives, “ain’t” is part of many English dialects, but it’s not advisable in formal English writing.
For example, if you’re writing a formal essay or communicating at work, it’s better to say “Laughter isn’t always the best medicine” than “Laughter ain’t always the best medicine.”
QuillBot’s free Grammar Checker can help you avoid “ain’t” in formal writing.