A spoken or written remark.

(uncountable) The act of commenting.

(linguistics) The part of a sentence that provides new information regarding the current theme.

(programming) A remark embedded in source code in such a way that it will be ignored by the compiler or interpreter, typically to help people to understand the code.

(transitive) To remark.

(intransitive, with "on" or "about") To make remarks or notes.

(transitive, software, of code) To insert comments into (source code).

(transitive, software, of code) To comment out (code); to disable by converting into a comment.