1880 in modern sense, from de- + forest. Related: Deforested; deforesting. Disforest in the sense "to clear of trees" is from 1660s. Disafforest is attested in this sense from 1842; originally it meant "reduce from the legal status of a forest" (1590s).
(dĭ-fôr'ĭst) American electrical engineer and inventor who is known as "the father of radio." He patented more than 300 inventions, including the triode electron tube, which made it possible to amplify and detect radio waves.