Britannica Dictionary definition of DON'T
—
used as a contraction of do not
-
I don't like it.
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The shoes don't fit.
Usage
Don't is also sometimes used as a contraction of “does not.”
This use is often regarded as an error, but it is common in some varieties of English, especially in informal speech.
2
don't
/ˈdoʊnt/
noun
plural
don'ts
plural
don'ts
Britannica Dictionary definition of DON'T
[count]
informal
:
something that a person should not do
—
usually used in the phrase dos and don'ts