Dictionary.com
Thesaurus.com

Koch

American  
[koch, kawkh] / kɒtʃ, kɔx /

noun

  1. Edward I., 1924–2013, U.S. politician: mayor of New York City 1977–89.

  2. Robert 1843–1910, German bacteriologist and physician: Nobel Prize 1905.


Koch British  
/ kɔx /

noun

  1. Robert (ˈroːbɛrt). 1843–1910, German bacteriologist, who isolated the anthrax bacillus (1876), the tubercle bacillus (1882), and the cholera bacillus (1883): Nobel prize for physiology or medicine 1905

"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

Koch Scientific  
/ kôk /
  1. German bacteriologist who demonstrated that specific diseases are caused by specific microorganisms. He identified the bacilli that cause anthrax, tuberculosis, and cholera, and he showed that fleas and rats are responsible for transmission of the bubonic plague and that the tsetse fly is responsible for transmitting sleeping sickness. Koch won the Nobel Prize for physiology or medicine in 1905.


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.

See Examples For:

Meir previously made history in 2019 when she and Nasa astronaut Christina Koch completed the first ever all-female spacewalk.

From BBC Sep. 1, 2026

Atlas also has long-standing links with ExxonMobil and the Charles Koch Foundation.

From Salon Sep. 1, 2026

Koch said he had a feeling during the race that another win could be problematic.

From Los Angeles Times Aug. 30, 2026

“I got the chills when you said it,” Koch said.

From Los Angeles Times Aug. 28, 2026

“But he told me he had seen your papers, that you're a courier for Koch, and that Koch appointed me as your nurse!”

From "Salt to the Sea" by Ruta Sepetys

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training