Definition of commonplace

• a. - Common; ordinary; trite; as, a commonplace person, or observation.
• n. - An idea or expression wanting originality or interest; a trite or customary remark; a platitude.
• n. - A memorandum; something to be frequently consulted or referred to.
• v. t. - To enter in a commonplace book, or to reduce to general heads.
• v. i. - To utter commonplaces; to indulge in platitudes.