Definition of commonplace:
ordinary, common or garden, allusion, unexciting, obligatory, trite, matter-of-fact, backchat, prosy, bromidic, garden, typical, platitudinous, prevalent, acknowledgment, prosaic, ubiquitous, timeworn, overworked, unoriginal, pedestrian, trivial, good, study at trite, musty, unremarkable, old-hat, tired, hack, well-worn, hackneyed, clichéd, standard-issue, threadbare, barb, unglamorous, undistinguished, workaday, stereotypic, garden-variety, earthbound, comment, overused, bon mot, indifferent, nondescript, worn-out, corny, public, cobwebby, formulaic, platitudinal, stock, humdrum, stereotyped, plain, surprise, popular, moth-eaten, aside, cliche, stereotypical, hackney, platitude, shopworn, stale, excite, household, quotidian, unglamourous, bromide, banality, unexceptional, afterthought, banal, warmed-over, back talk, cut-and-dried.
- average (part of speech: adjective)
regular (part of speech: adjective)
- boring (part of speech: adjective)
- "Lady-John-Russell", MacCarthy, Desmond.
- "Mysterious Mr. Sabin", E. Phillips Oppenheim.
A good but commonplace man spoke to me with tears in his eyes of his endless gratitude to Dr. Bellows because on one New Year's Day he preached a doctrine of promise, and said that men did their best, and that the world was as good as could be expected; not an extraordinary doctrine certainly, but one that is seldom announced with so much cordial, human sympathy.- "Recollections and Impressions 1822-1890", Octavius Brooks Frothingham.