baby boomlet noun3 •An increase in birth rate that occurred when the baby boomers reached childbearing age.The baby boomlet was a period marked by increases in the number of women of childbearing age and increases in fertility rates of those women. — 2002 •Any spike in birth rate that is smaller than the baby boom.Following the Second World War there were "baby boomlets" in Europe, but these lasted for only a year or two, unlike the prolonged birth rise in New Zealand, Australia, Canada, and the United States. — 1992 •A child of a baby boomer, born during the baby boomlet.Baby boomlets (consumers born between 1977 and 1997 and also known as "Gen Y") have emerged as the next cohort since the baby boomers to receive the close attention of retailers (Bounds, 2000). — 2002 formsbaby boomlets