tune up verb 5/ˈtunˌʌp/ noun 3forms 4 verb5 •To make adjustments (to an engine or bicycle drivetrain) in order to improve its performance. •To tune one's instrument in preparation for performance.By this time the theatre had practically filled and the orchestra was tuning up for the overture. — 1923 •To make preparations for vigorous exercise; to warm up. •(US) To beat up (someone).“We finally stopped roustin' him and decided to tune him up instead, every chance we got.” “Tune him up?” “Yeah, that's an expression for beatin' the living dog shit outta somebody.” — 2007 •To begin to sing or play music. tune-up /ˈtunˌʌp/ noun3 •A series of adjustments to an engine in order to improve its performance •A series of preparations for vigorous exercise; a warm-up •A match or race (frequently one exhibition in nature) contested as preparation for a match or race of high stakes. formstuned up · tuning up · tunes up · tune-ups