/ Dictionary / Index P P-Celtic: Meaning and Definition of Find definitions for: P-Celt•ic Pronunciation: (pē'sel'tik, -kel'-), [key] — n. the subbranch of Celtic in which the Proto-Indo-European kw-sound became a p-sound. Welsh, Breton, Cornish, and Gaulish belong to P-Celtic. —adj. of or belonging to P-Celtic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. PC card pcf Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language