P Meaning of P in English 1. n. (also p) (pl. Ps or P's) the sixteenth letter of the alphabet. 2. abbr. (also P.) 1. (on road signs) parking. 2 Chess pawn. 3 Physics poise (unit). 4 proprietary. 3. symb. Chem. the element phosphorus. Oxford English vocab. Оксфордский английский словарь. 2012