/ Dictionary / Index D De Forest: Meaning and Definition of Find definitions for: De For•est Pronunciation: (di fôr'ist, for'-), [key] 1873–1961, U.S. inventor of radio, telegraphic, and telephonic equipment. de•for•est Pronunciation: (dē-fôr'ist, -for'-), [key] — v.t. to divest or clear of forests or trees: Poor planning deforested the area in ten years. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deforest (Thesaurus) deforciant deform Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language