[noun] a statement that expresses a personal opinion or belief; "from time to time she contributed a personal comment on his account" Synonyms:remark
[noun] a written explanation or criticism or illustration that is added to a book or other textual material; "he wrote an extended comment on the proposal" Synonyms:ary
[noun] a report (often malicious) about the behavior of other people; "the divorce caused much gossip" Synonyms:gossip, scuttlebutt
[verb] make or write a comment on; "he commented the paper of his colleague" Synonyms:notice, remark, point out
[verb] explain or interpret something
[verb] provide interlinear explanations for words or phrases; "He annotated on what his teacher had written" Synonyms:gloss, annotate