Breadcrumb Home > Dictionary > Index B blowup: Meaning and Definition of Find definitions for: blow•up Pronunciation: (blō'up"), [key] — n. an explosion. a violent argument, outburst of temper, or the like, esp. one resulting in estrangement. an enlargement of a photograph. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: blowup (Thesaurus) blowtube blowy 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: manoamano Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language