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Synonyms

bosh

1 American  
[bosh] / bɒʃ /

noun

  1. absurd or foolish talk; nonsense.

bosh 2 American  
[bosh] / bɒʃ /

noun

Metallurgy.

  1. the section of a blast furnace between the hearth and the stack, having the form of a frustum of an inverted cone.

bosh 1 British  
/ bɒʃ /

noun

  1. the lower tapering portion of a blast furnace, situated immediately above the air-inlet tuyères

  2. the deposit of siliceous material that occurs on the surfaces of vessels in which copper is refined

  3. a water tank for cooling glass-making tools, etc

  4. dialect a kitchen sink or wash basin

"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
bosh 2 British  
/ bɒʃ /

noun

  1. informal empty or meaningless talk or opinions; nonsense

"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

Etymology

Origin of bosh1

1830–35; < Turkish boş empty; popularized from its use in the novel Ayesha (1834) by British author James J. Morier (1780–1849)

Origin of bosh2

1670–80; probably < German; akin to German böschen to slope, Böschung slope, scarp

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.

Fisher - who is famous for his love of Chinese takeaway and his signature catchphrase "bosh" - arrived in Western Australia on Tuesday ahead of a tour of the country.

From BBC • Oct. 14, 2025

He's the biggest man in this list by some distance but anyone who thinks the 6ft 4in Wales winger is a straight-ahead bosh merchant doesn't understand what North is all about.

From BBC • Mar. 16, 2017

Whatever this is, it is clearly not the work of your archetypal bosh bosh clubland crazies.

From The Guardian • Dec. 30, 2010

"I think it's a bunch of bosh," said Wallace Broecker, a professor at Columbia University.

From Washington Post • Sep. 28, 2009

When I speak of love I am not speaking of some sentimental and weak response which is little more than emotional bosh.

From "While the World Watched: A Birmingham Bombing Survivor Comes of Age during the Civil Rights Movement" by Carolyn Maull McKinstry

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.