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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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The concept of the Great American Novel, introduced by John W. De Forest in 1868, has always been a mirage, since the country is too varied to be contained in a single work.

From The Wall Street Journal • Jun. 19, 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

As a field, Dr. De Forest said, bloodstain-pattern analysis still has the potential to be informative, but only when practiced correctly by those with adequate scientific education.

From New York Times • Jan. 17, 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 landlord here for a considerable time was Mr. De Forest, an American who, in some way or other, had been deprived of his ears.

From Toronto of Old by Scadding, Henry

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