a.1.Somewhat common; commonplace; vulgar.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
He was a commonish man in black with a band round his bowler hat; he had something of Fanny's clumsy look; he wore a stubbly moustache, and had a cockney accent.
"There is plenty we have in commonish, then I get favourite songs that I like for a really long time, and he says it is because I am middleaged.