proˈsaicness [f. as prec. + -ness.] Prosaic quality or character. 1887Jrnl.Educ. 1 Feb. 79 That Dutch picture..in its unadulterated materiality and prosaicness.1890Athenæum 8 Mar. 303/3 The vulgarity and prosaicness of these people and their surroundings.