true up verb 2true-up noun 1forms 5 verb2 •To make something true, equal, or correct, as for example by turning and facing a part on a lathe.He trued up his faceplate before doing the next setup.He trued up the brake discs and installed new pads. •To make a wheel level, balanced or even by adjusting the spokes; to true a wheel; ideally, to make it perfectly circular in relation to the hub with no left or right bulges nor 'flat spots'. true-up noun1 •An adjustment to make something equal or correct.Use this code for any accounting adjustments or "true-ups" for service provided in prior reporting years. — 2013 formstrued up · trueing up · truing up · trues up · true-ups