(idiomatic, slang, often imperative) To select something as one's preferred choice from a set of related things, people etc.

The act of staying too long.

(philosophy) The thesis or contention that a private language cannot exist.

(chemistry) Abbreviation of phencyclidine. / (organic chemistry) Abbreviation of pentachlorophenol. / (biochemistry) Initialism of peptidyl carrier protein.