Breadcrumb Home > Dictionary > Index A app: Meaning and Definition of Find definitions for: app Pronunciation: (ap), [key] &hasp;). an application program; application software. app. Pronunciation: [key] apparatus. apparent. appendix. applied. appointed. approved. approximate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. apotropaism appal TrendingHere are the facts and trivia that people are buzzing about. Ramadan and Eid al-Fitr 42 Best War Movie Quotes Current Events This Week: March 2023 Recycling Facts William Shakespeare Worst U.S. Forest Fires ✖ Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language