/ Dictionary / Index O overstory: Meaning and Definition of Find definitions for: o•ver•sto•ry Pronunciation: (ō'vur-stôr"ē, -stōr"ē), [key] — pl. -ries. the uppermost layer of foliage in a forest, forming the canopy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. overstood overstress Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language