/ Dictionary / Index T tussock grass: Meaning and Definition of Find definitions for: tus'sock grass" Pronunciation: [key] any of various grasses that grow in tuftlike clumps. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tussock caterpillar tussock moth Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language