- baby boomer.
- a period of sudden and decisive economic growth: July was a boomer for the retail trade.
- a person who settles in areas or towns that are undergoing a period of rapid economic or population growth: He was among the first boomers to settle in the town when it began to grow.
- a person, fad, etc., that enjoys a brief popularity or financial success: This season's hit album turned the group into a boomer.
- a person or thing that booms: These speakers are real boomers with an amazing balance of bass to treble.
- an enthusiastic supporter; booster: The boomers tell us our town can double its size.
- a fully grown male kangaroo, especially a large one.
- a submarine that can fire intercontinental ballistic missiles and especially those equipped with a nuclear warhead.
- a wandering or migratory worker; hobo.
- a large male kangaroo
- anything exceptionally large
