Commonplace \Com"mon*place`\, v. t. To enter in a commonplace book, or to reduce to general heads. --Felton.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Commonplace \Com"mon*place`\, a. Common; ordinary; trite; as, a commonplace person, or observation.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Commonplace \Com"mon*place`\, n.

1. An idea or expression wanting originality or interest; a trite or customary remark; a platitude.

2. A memorandum; something to be frequently consulted or referred to.

Whatever, in my reading, occurs concerning this our fellow creature, I do never fail to set it down by way of commonplace. --Swift.

Commonplace book, a book in which records are made of things to be remembered.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Commonplace \Com"mon*place`\, v. i. To utter commonplaces; to indulge in platitudes. [Obs.]

--Bacon.

Source: Webster's Revised Unabridged Dictionary (1913)