vt to comment on.
2. comment ·noun a remark, observation, or criticism; gossip; discourse; talk.
3. comment ·noun a note or observation intended to explain, illustrate, or criticise the meaning of a writing, book, ·etc.; explanation; annotation; exposition.
4. 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.