1 [bosh]
absurd or foolish talk; nonsense.

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


2 [bosh]
noun Metallurgy.
the section of a blast furnace between the hearth and the stack, having the form of a frustum of an inverted cone.

1670–80; probably < German; akin to German böschen to slope, Böschung slope, scarp Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bosh1 (bɒʃ)
informal empty or meaningless talk or opinions; nonsense
[C19: from Turkish boş empty]

bosh2 (bɒʃ)
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 (South Wales) a kitchen sink or wash basin
[C17: probably from German; compare böschen to slope, Böschung slope]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

"empty talk, nonsense," 1834, from Turkish, lit. "empty." Introduced in "Ayesha," popular romance novel by J.J. Morier (1780-1849).
Online Etymology Dictionary, © 2010 Douglas Harper
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