makeup /ˈmeɪkʌp/ noun5 •colored creams and other things that people put on their skin to change the way it looksShe is wearing a lot of makeup. •An item's composition.To understand how a nuclear reactor works, we must first look at its makeup. •A test given to students allowing them to repeat failed material.“Will I get a chance to take a makeup? My mother paid for the exam.” — 2020 •Replacement; material used to make up for the amount that has been used up.When the water level drops, the float ball drops with it and opens the valve to the makeup water supply. — 2005 •In a NIMCRUT, an amount distributed from the trust's income in subsequent years to make up for a present shortfall. formsmakeups