1. Plural of flattop; aircraft carriers, especially those with a flat flight deck.
Usage: informal; nautical; military
2. Plural of flattop; flat-topped mountains or hills.
Usage: informal; geographical

Examples

• The Navy deployed several flattops to the Pacific during the operation.
• Modern flattops can carry dozens of aircraft.
• The desert landscape featured several distinctive flattops rising from the plains.
• During World War II, flattops became the dominant warships in naval combat.
• The crew worked on the flight deck of one of the Navy's newest flattops.