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De Forest

American  
[di fawr-ist, for-] / dɪ ˈfɔr ɪst, ˈfɒr- /

noun

  1. Lee, 1873–1961, U.S. inventor of radio, telegraphic, and telephonic equipment.


De Forest British  
/ də ˈfɒrɪst /

noun

  1. Lee. 1873–1961, US inventor of telegraphic, telephonic, and radio equipment: patented the first triode valve (1907)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Yet when De Forest rented a theater in 1923 to demonstrate several sound shorts, studio heads showed no interest.

From The Wall Street Journal Feb. 14, 2026

Wisconsin purchasing agents on March 26 paid $19,799 for 2,100 N95s at an Ace Hardware in De Forest.

From Washington Times Dec. 19, 2020

De Forest was a member of a talented generation of artists that started emerging in the Bay Area in the early 1950s, among them Joan Brown, Peter Saul, Robert Arneson, H.C.

From New York Times Apr. 9, 2020

Artists included in this show at the Parker include figures such as Wallace Berman, Kurt Schwitters, Roy De Forest and Franklin Williams.

From Los Angeles Times Jun. 13, 2019

The De Forest wireless telephone was adopted for use in the United States Navy shortly before the cruise around the world in 1908.

From The Story of Great Inventions by Burns, Elmer Ellsworth

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