Webster's Revised Unabridged Dictionary · 1913

Comment

Comment (?; 277) , v. i.

[F. commenter, L. commentari to meditate upon, explain, v. intens. of comminisci, commentus, to reflect upon, invent; com- + the root of meminisse to remember, mens mind. See Mind.]

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.
A physician to comment on your malady. — Shakespeare
Critics... proceed to comment on him. — Dryden
I must translate and comment. — Pope

Comment , v. t.

To comment on.

Comment , n.

[Cf. OF. comment.]

1.
A remark, observation, or criticism; gossip; discourse; talk.
Their lavish comment when her name was named. — Tennyson
2.
A note or observation intended to explain, illustrate, or criticise the meaning of a writing, book, etc.; explanation; annotation; exposition.
All the volumes of philosophy,b With all their comments. — Prior