/ Dictionary / Index T treelined: Meaning and Definition of Find definitions for: tree•lined Pronunciation: (trē'līnd"), [key] — adj. having a line of trees: a treelined road. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tree line tree lupine Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language