/ Dictionary / Index T thistly: Meaning and Definition of Find definitions for: this•tly Pronunciation: (this'lē, -u-lē), [key] — adj. filled with or having many thistles. suggesting a growth of thistles, esp. in being difficult or painful to handle: a thistly set of problems. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thistle tube this-worldliness Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language