a series of comments, explanations, or annotations: a commentary on the Bible; news followed by a commentary.
an explanatory essay or treatise: a commentary on a play; Blackstone's commentaries on law.
anything serving to illustrate a point, prompt a realization, or exemplify, esp. in the case of something unfortunate: The dropout rate is a sad commentary on our school system.
Usually,records of facts or events: Commentaries written by Roman lawyers give us information on how their courts functioned.