/ Dictionary / Index F flanker: Meaning and Definition of Find definitions for: flank•er Pronunciation: (flang'kur), [key] — n. a person or thing that flanks. one of a body of soldiers placed on the flank of an army to guard a line of march. a fortification projecting so as to defend another work or to command the flank of an assailing body. Also calledflank&prim;er back&sec;.an offensive back who lines up outside of an end. Seesplit end. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: flanker (Thesaurus) flanken flank speed Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language