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