A person who has fallen out of the boat.

A person who has fallen out of a boat

In BEAM robotics, a swimmer is a robot that functions on or in a liquid environment. These are sometimes referred to as aquabots or aquavores (the latter being a misnomer, as they are not "water eaters"). Swimmers include various designs, but usually lie within a device class that can be delineated as a watercraft, usually a boat but includes any vehicle designed to move across (or through) water.

A swimming bird; one of the natatores.

an Atlanta attorney, and he also served on the state appellate bench

A protuberance on the leg of a horse.

Anyone who has capsized and is floating or swimming down the river.

a powered suit designed for underwater operations that require a great deal of protection (operating at great depths, combat situations, hostile sea life and so forth)

a trained athlete who participates in swimming meets; "he was an Olympic swimmer"

a person who travels through the water by swimming; "he is not a good swimmer"

a person that swims

One who swims.