/ Dictionary / Index P pct.: Meaning and Definition of Find definitions for: pct. Pronunciation: [key] percent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pct (Thesaurus) PCP PCT theorem Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language