The Collaborative International Dictionary of English v.0.48:

makeup \make"up`\, make-up \make"-up`\(m[=a]k"[u^]p`), n.
   1.

   1. The way in which the parts of anything are put together.
      [1913 Webster]

            The unthinking masses are necessarily teleological
            in their mental make-up.              --L. F. Ward.
      [1913 Webster]

   2. The constituent parts of anything; as, the makeup of the
      new congress was predominantly conservative.
      [PJC]

   3. Cosmetics applied to the face, such as lipstick, facial
      power, or eye shadow.
      [PJC]

   4. The aggregate of cosmetics and costume worn by an actor.
      [PJC]

   5. The effect or appearance of the wearing of makeup (in
      senses 3 or 4); often, the way in which an actor is
      dressed, painted, etc., in personating a character; as,
      her makeup was very realistic.
      [PJC]

   6. An action that is taken to fulfill a requirement not
      accomplished at the expected time, such as a make-up
      examination; as, the student took his make-up on Saturday.
      [PJC]

   7. (Printing) The appearance of a page of a publication,
      specifically the type style of the text and the spatial
      arrangement of the text, illustrations, advertising
      material etc., on the page.
      [PJC]

   8. (Printing) The art or process of arranging the portions of
      a printed publication on the pages for esthetic reasons or
      for optimal effect on the reader.
      [PJC]

WordNet (r) 3.0 (2006):

make-up
    n 1: an event that is substituted for a previously cancelled
         event; "he missed the test and had to take a makeup"; "the
         two teams played a makeup one week later" [syn: makeup,
         make-up]
    2: the way in which someone or something is composed [syn:
       constitution, composition, physical composition,
       makeup, make-up]
    3: cosmetics applied to the face to improve or change your
       appearance [syn: makeup, make-up, war paint]