pert UK /pɜːt/US /pɝt/adjective 6noun 1verb 1forms 5 adjective6 •Lively; alert and cheerful; bright.Goe Philostrate, / Stirre vp the Athenian youth to merriments, / Awake the peart and nimble spirit of mirth, / Turne melancholy foorth to funerals: […] — 1595 •Attractive. •Well-formed; shapely.pert breasts •Especially of children or social inferiors: cheeky, impertinent.Says Mrs. Jervis, Pamela, don’t be pert to his Honour? You should know your Distance; you see his Honour was only in Jest. — 1741 •(no longer used) Clever. •(no longer used) Open; evident; unhidden.Some parled as perte · as prouyd well after, / And clappid more ffor þe coyne · þat þe kyng oweth hem / Thanne ffor comfforte of þe comyne […] — 1873 noun1 •(no longer used) An impudent person. verb1 •(no longer used) To behave with pertness; to misbehave. formsperted · perting · perts · perter · pertest