From the verb phrase make up.
- (uncountable) An item’s composition. To understand how a nuclear reactor works, we must first look at its makeup.
- (uncountable) Cosmetics; colorants and other substances applied to the skin to alter its appearance. She is wearing a lot of makeup.
- (manufacturing) Replacement; material used to make up for the amount that has been used up.
- 2005, William C. Whitman, William M. Johnson, John A. Tomczyk, Refrigeration & Air Conditioning Technology, page 1208: When the water level drops, the float ball drops with it and opens the valve to the makeup water supply.
- (education) A test given to students allowing them to repeat failed material.
The alternative spelling make-up is favored by the Oxford Dictionary and thus is often considered to be British, while makeup, being preferred by Merriam Webster’s dictionary, is the generally accepted American spelling.
- (composition): configuration, constitution, form; see also Thesaurus:composition
- (cosmetics): beauty products, cosmetics, product, slap, war paint
- (cosmetics): See also Thesaurus:toiletry
- ^ In reference with Jean-Claude Corbeil/Ariane Archambault: Visual Dictionary, Look up a Word from a Picture, Find the Picture from a Word. (New York, USA / Oxford, UK, 1987)