pTranslate p | into French | into German | into Italian | into Spanish Definition of p abbreviation page: see p 784 (p-) [in combination] Chemistry para-:p-xylene British penny or pence: a 5p coin Music piano (softly). [in combination] (in units of measurement) pico- (10−12):a 220 pf capacitor Chemistry denoting electrons and orbitals possessing one unit of angular momentum: p-electrons[from principal, originally applied to lines in atomic spectra] symbol Physics pressure: pV = nRT Statistics probability: this difference was significant (p = 0.0008)p in other Oxford dictionaries Definition of p in the US English dictionary