Definitions:

1. A period marked by a significant increase of birth rates. NOUN
   • The baby boom led to the expansion of suburbs as families sought larger homes for their growing numbers.
2. Used to describe a significant increase in birth rates, particularly referring to the period following World War II. NOUN
   • The baby boom after World War II resulted in a significant population increase in many Western countries.

Synonyms:

• Population surge
• post-war birth increase