Definition of: p, P

(pē) noun plural p's, P's, or ps, Ps, pees (pēz)
1. The 16th letter of the English alphabet: from Phoenician pe, Greek pi, Roman P.
2. The sound of the letter p, the voiceless bilabial stop. See ALPHABET.
—symbol
1. Chem. Phosphorus (P).
2. Genetics The parental generation: followed by a subscript numeral, as P₁, P₂, to indicate the first, second, etc., parental generation.
—to mind one's P's and Q's To be careful of one's behavior.