bosh
1 Americannoun
noun
noun
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the lower tapering portion of a blast furnace, situated immediately above the air-inlet tuyères
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the deposit of siliceous material that occurs on the surfaces of vessels in which copper is refined
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a water tank for cooling glass-making tools, etc
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dialect a kitchen sink or wash basin
noun
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.
He is also known for his social media videos encouraging people to think positively, which typically end with a trademark "bosh".
From BBC • Dec. 20, 2025
"I'm still smiling and I still love Australia," he wrote before signing off with his famed slogan "bosh" - a British slang word often used as an enthusiastic exclamation.
From BBC • Oct. 14, 2025
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
He was also sore about the shoulders and had a burning ear, from making bosh shots at the quintain— for, of course, practice tilting was done without armour.
From "The Once and Future King" by T. H. White
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.
