/ Dictionary / Index R rustler: Meaning and Definition of Find definitions for: rus•tler Pronunciation: (rus'lur), [key] — n. a cattle thief. a person or thing that rustles. an active, energetic person. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rustler (Thesaurus) rustle rustless 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