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baby boom

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noun
  1. a period of sharp increase in the birthrate, as that in the U.S. following World War II.
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Origin of baby boom

First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for baby boom

baby boom

noun
  1. a sharp increase in the birth rate of a population, esp the one that occurred after World War IIAlso called (esp Brit): the bulge
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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

Word Origin and History for baby boom

n.

coined 1941, from baby (n.) + boom (n.); derivative baby-boomer (member of the one that began 1945) recorded by 1974.

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Online Etymology Dictionary, © 2010 Douglas Harper