Swim has 13 different meanings across 4 categories:
Noun · Verb · Pron · Proper Noun
An act or instance of swimming.
"In the underground forum thread about purchasing illegal substances, users frequently employed swim to refer to other participants without revealing their own identity."
A dizziness; swoon.
Abbreviation of someone who isn't me. used as a way to avoid self-designation or self-incrimination, especially in online drug forums
In plain English: A swim is an act of swimming across water, usually for exercise or fun.
"The swim was refreshing after such a hot day."
travel through water
"We had to swim for 20 minutes to reach the shore"
"a big fish was swimming in the tank"
To move through the water, without touching the bottom; to propel oneself in water by natural means.
"After spinning in circles on the dance floor, I felt so dizzy that everything seemed to swim before my eyes."
To be dizzy or vertiginous; have a giddy sensation; to have, or appear to have, a whirling motion.
In plain English: To swim is to move your body through water by using your arms and legs.
"We went to the beach early in the morning so we could swim before the tide came in."
Usage: Use "swim" as an intransitive verb when describing the action of moving through water without touching the bottom. You can also use it metaphorically to describe objects that seem to move erratically due to dizziness, such as stars appearing to swim across a dark sky.
Someone who isn't me; someone who isn't myself
"The other swimmers in the pool were not me, but just strangers sharing the lane."
A surname.
"The famous swim family has lived in the coastal town for three generations."
The word "swim" comes from Old English swimman, which originally meant to swim or float. Its roots trace back through Germanic languages to a Proto-Indo-European term meaning to be unsteady or move.