Adjective commonplace has 4 senses
  1. banal, commonplace, trivial - obvious and dull; "trivial conversation"; "commonplace prose"
    Antonym: extraordinary (indirect, via ordinary)
  2. commonplace - completely ordinary and unremarkable; "air travel has now become commonplace"; "commonplace everyday activities"
    extraordinary (indirect, via ordinary)
  3. commonplace, humdrum, prosaic, unglamorous, unglamourous - not challenging; dull and lacking excitement; "an unglamorous job greasing engines"
    Antonym: exciting (indirect, via unexciting)
  4. banal, commonplace, hackneyed, old-hat, shopworn, stock, threadbare, timeworn, tired, trite, well-worn - repeated too often; overfamiliar through overuse; "bromidic sermons"; "his remarks were trite and commonplace"; "hackneyed phrases"; "a stock answer"; "repeating threadbare jokes"; "parroting some timeworn axiom"; "the trite metaphor `hard as nails'"
    Antonym: original (indirect, via unoriginal)
,Noun commonplace has 1 sense
  1. platitude, cliche, banality, commonplace, bromide - a trite or obvious remark
    --1 is a kind of remark, comment; truism