/ Dictionary / Index J jackboot: Meaning and Definition of Find definitions for: jack•boot Pronunciation: ( jak'bt"), [key] — n. a sturdy leather boot reaching up over the knee, worn esp. by soldiers. Also calledbrutally bullying, militaristic, or authoritarian measures. a person who uses such measures. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: jackboot (Thesaurus) jack block jackbooted Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language