/ Dictionary / Index A antiknock: Meaning and Definition of Find definitions for: an•ti•knock Pronunciation: (an"tē-nok', an"tī-), [key] — adj. noting or pertaining to any material added to fuel for an internal-combustion engine to eliminate or minimize knock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antiknock (Thesaurus) anti-intellectual Antikythera Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language