One who comments.

(intransitive) To provide a commentary; to act as a commentator; to maintain a stream of comments about some event.

simple past tense and past participle of commentate

present participle of commentate

Third-person singular simple present indicative form of commentate

(of film music) That occurs outside of the context of the film's action, and therefore cannot be heard by the film's characters.

A person who talks or writes about events and explains them

(programming) A comment in source code that can be interpreted as a directive by some systems, but is ignored by those others that are not aware of the convention; formerly used to overcome compatibility issues between web browsers.

(politics, law) Input given by the public to governmental (or rarely other) bodies, about proposed legislation or regulation(s), during a period—and by means—set aside and prescribed by law.

(law) A process of rulemaking in which a proposed rule is published in the Federal Register and is subject to comment by members of the general public.