adjective

not unusual; ordinary.

unemployment was commonplace in his trade

ordinary,run-of-the-mill,middle-of-the-road,mainstream,unremarkable,unexceptional,undistinguished,uninspired,unexciting,unmemorable,forgettable,indifferent,average,so-so,mediocre,pedestrian,prosaic,lacklustre,dull,bland,uninteresting,mundane,everyday,quotidian,humdrum,hackneyed,trite,banal,clichéd,predictable,overused,overdone,overworked,stale,worn out,time-worn,tired,unoriginal,derivative,common or garden,garden variety,nothing to write home about,nothing to get excited about,no great shakes,not so hot,not up to much,vanilla,plain vanilla,bog-standard,a dime a dozen,old hat,corny,played out,hacky,not much cop,ten a penny,ornery,bush-league,cornball,dime-store,half-pie,common,normal,usual,familiar,routine,standard,day-to-day,daily,regular,frequent,habitual,conventional,typical

noun

a usual or ordinary thing.

bombing has become almost a commonplace of public life there

everyday thing/event,routine,nothing out of the ordinary