gentlepersonly adjective1 •Having the manners or behavior of a gentleperson; having social graces; polite.Possibly there have never been, in one ampitheater,^([sic]) three gladiators more civilized in style, more moderate in instinct, more gentlepersonly in mood, than Babbidge, Grasso and Killian. — 1974 formsmore gentlepersonly · most gentlepersonly