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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

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 idea of it recoiling forward is absurd,” Peter De Forest, a widely respected forensic scientist, said in the article.

From New York Times ● Aug. 27, 2015

De Forest sincerely hoped that Flora would not be brought along, but, oh! deceitful man, he expressed a wish to Mrs. Maroney that the darling child accompany them.

From The Expressman and the Detective by Allan Pinkerton

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