to move in water by movements of the limbs, fins, tail, etc.

to float on the surface of water or some other liquid.

to move, rest, or be suspended in air as if swimming in water.

to move, glide, or go smoothly over a surface.

to be immersed or steeped in or overflowing or flooded with a liquid

eyes swimming with tears.

to be dizzy or giddy; seem to whirl

My head began to swim.

to move along in or cross (a body of water) by swimming

to swim a lake.

to perform (a particular stroke) in swimming

to swim a sidestroke.

to cause to swim or float, as on a stream.

to furnish with sufficient water to swim or float.

an act, instance, or period of swimming.

a motion as of swimming; a smooth, gliding movement. ?

in the swim

alert to or actively engaged in events; in the thick of things

Despite her age, she is still in the swim.