[com.men.tary] n, pl -tar.ies (15c) 1 a: an explanatory treatise--usu. used in pl. b: a record of events usu. written by a participant--usu. used in pl.
2. a: a systematic series of explanations or interpretations (as of a writing) b: comment
2. 3 a: something that serves for illustration or explanation "the dark, airless apartments and sunless factories ... are a sad ~ upon our civilization --H. A. Overstreet" b: an expression of opinion