fins

One of the appendages of a fish, used to propel itself and to manoeuvre/maneuver.

“The fish's fins minimize water flow.”

A similar appendage of a cetacean or other marine animal.

“a dolphin's fin”

A thin, rigid component of an aircraft, extending from the fuselage and used to stabilise and steer the aircraft.

“The fin stabilises the plane in flight.”

A similar structure on the tail of a bomb, used to help keep it on course.

A hairstyle, resembling the fin of a fish, in which the hair is combed and set into a vertical ridge along the top of the head from about the crown to the forehead.

A device worn by divers and swimmers on their feet.

“The divers wore fins to swim faster.”

An extending part on a surface of a radiator, engine, heatsink, etc., used to facilitate cooling.

A sharp raised edge (generally in concrete) capable of damaging a roof membrane or vapor retarder.

To cut the fins from a fish, shark, etc.

(Of a fish) to swim with the dorsal fin above the surface of the water.

To swim in the manner of a fish.

“A neutrally buoyant diver does not need to fin to maintain depth.”

To provide (a motor vehicle etc) with fins.

(formerly Australia) a five-pound (£5) note; the sum of five pounds.

A five-dollar bill; the sum of five dollars.