Breadcrumb Home > Dictionary > Index H hacking jacket: Meaning and Definition of Find definitions for: hack'ing jack"et Pronunciation: [key] — Chiefly Brit. Chiefly Brit. a riding jacket having a tight waist, flared skirt, slanted pockets with flaps, and slits or vents at the sides or back. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hacking hackle TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: empyrean Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language