capitular noun 3adjective 2forms 1 noun3 •A member of a chapter.The chapter itself, and all its members or capitulars. — 1726 •An act passed in a chapter. •The head or prominent part. adjective2 •Pertaining to an ecclesiastical chapter.From the pope to the member of the capitular body. — 1855 •Pertaining to a capitulum. formscapitulars