/ Dictionary / Index A ACTP: Meaning and Definition of Find definitions for: ACTP Pronunciation: [key] American College Testing Program. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Actors' Equity Association actress Related Content Daily Word Quiz: acerbity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language