Comment

Webster's Dictionary of the English Language

·vt To comment on.

II. Comment ·noun A remark, observation, or criticism; gossip; discourse; talk.

III. Comment ·noun A note or observation intended to explain, illustrate, or criticise the meaning of a writing, book, ·etc.; explanation; annotation; exposition.

IV. Comment ·vi To make remarks, observations, or criticism; especially, to write notes on the works of an author, with a view to illustrate his meaning, or to explain particular passages; to write annotations;

— often followed by on or upon.