1. [noun] (countable) Preparation.
2. [noun] Abbreviation of preposition.
3. [noun] (informal) (countable) preparatory school
4. [noun] (informal) (countable) A student or graduate of a prep school, a preppy. [from late 19th c.]
5. [noun] (British) (uncountable) Homework, work set to do outside class time, used widely in public schools and preparatory schools but not state schools.
6. [verb] (informal) To prepare.
7. [noun] Preparatory school work done outside school (especially at home).
