We found 2 dictionaries that define the word p or p:

General (1 matching dictionary)

1. p or P: The Wordsmyth English Dictionary-Thesaurus

Science (1 matching dictionary)

2. How Many? A Dictionary of Units of Measurement (No longer online)

(Note: See p's as well.)

▸ Also see p's ▸ Words similar to p or p ▸ Usage examples for p or p ▸ Idioms related to p or p ▸ Wikipedia articles (New!) ▸ Words that often appear near p or p ▸ Rhymes of p or p ▸ Invented words related to p or p