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jumbo boom

 - 1 dictionary result

jum⋅bo

[juhm-boh] noun, plural -bos, adjective Informal.
–noun
1. a very large person, animal, or thing.
2. jumbo jet.
3. U.S. Nautical.
a. a forestaysail having a boom (jumbo boom) along its foot, used esp. on schooners.
b. a sail used in place of a course on a square-rigged ship, having the form of an isosceles triangle set apex downward.
c. a narrow triangular sail set point downward in place of a foresail on a topsail schooner.
–adjective
4. very large: the jumbo box of cereal.

Origin:
1800–10; orig. uncert.; popularized as the name of a large elephant purchased and exhibited by P.T. Barnum in 1882
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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