Meaning of P in English

P

I. P BrE AmE , p /piː/ noun ( plural P’s , p’s ) [uncountable and countable]

the 16th letter of the English alphabet

⇨ mind your p’s and q’s at ↑ mind 2 (23)

II. P BrE AmE British English

the written abbreviation of provisional , used on cars to show that the driver is a learner and has a ↑ provisional licence ⇨ ↑ P-plate

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.