{ , n. [ L. consonantia: cf. F. consonnance. ] 1. (Mus.) Accord or agreement of sounds produced simultaneously, as a note with its third, fifth, and eighth. [ 1913 Webster ] 2. Agreement or congruity; harmony; accord; consistency; suitableness. [ 1913 Webster ] The perfect consonancy of our persecuted church to the doctrines of Scripture and antiquity. Hammond. [ 1913 Webster ] The optic nerve responds to the waves with which it is in consonance. Tyndall. [ 1913 Webster ] 3. Friendship; concord. [ Obs. ] [ 1913 Webster ] By the consonancy of our youth. Shak. Syn. -- Agreement; accord; consistency; unison; harmony; congruity; suitableness; agreeableness. [ 1913 Webster ] Variants: Consonance | 