1. A stabilizer that resembles the fins of a fish.
2. Organ of locomotion and balance in fishes and some other aquatic animals.

1 finance; financial
2 finish

A 5-dollar bill.

1. To equip with fins, as of a car.
2. To propel oneself through the water in a finning motion.
3. To show the fins above the water while swimming (of fish); SYN. break water.