comment

Concise Oxford English Dictionary © 2008 Oxford University Press:
comment/ˈkɒment/

▶noun

• 1 a remark expressing an opinion or reaction.

  ■ discussion, especially of a critical nature.

• 2 an explanatory note in a text.

  ■ archaic a written explanation or commentary.

▶verb express an opinion or reaction.

– derivatives
commenter noun.

– origin ME: from L. commentum ‘contrivance’ (in late L. also ‘interpretation’), neut. past part. of comminisci ‘devise’.