baby boom

noun

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

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

n.

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