Definition of boomer

• n. - One who, or that which, booms.
• n. - A North American rodent, so named because it is said to make a booming noise. See Sewellel.
• n. - A large male kangaroo.
• n. - One who works up a "boom".
• n. - One who, or that which, booms.
• n. - A North American rodent, so named because it is said to make a booming noise. See Sewellel.
• n. - A large male kangaroo.
• n. - One who works up a "boom".