a. [ L. pertinens, -entis, p. pr. of pertinere: cf. F. pertinent. See Pertain. ] 1. Belonging or related to the subject or matter in hand; fit or appropriate in any way; adapted to the end proposed; apposite; material; relevant; as, pertinent illustrations or arguments; pertinent evidence. [ 1913 Webster ]
(adj) having precise or logical relevance to the matter at hand, Example:a list of articles pertinent to the discussion; remarks that were to the point
(adv) in a pertinent way, Example:what is singular about his use of them is that no other artist, of his time or any other, has painted them so directly, intimately and pertinently