Etymology
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baby boom (n.)

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

updated on March 14, 2017

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Definitions of baby boom from WordNet

baby boom (n.)
the larger than expected generation in United States born shortly after World War II;
Synonyms: baby-boom generation
Etymologies are not definitions. From wordnet.princeton.edu, not affiliated with etymonline.