verb

• (intransitive) To move through the water, without touching the bottom; to propel oneself in water by natural means.
  "We were now all upon a Level, as to our travelling; being unshipp’d, for our Bark would swim no farther, and she was too heavy to carry on our Backs […]"
• (intransitive) To become immersed in, or as if in, or flooded with, or as if with, a liquid
  "swimming in self-pity"
• (intransitive) To move around freely because of excess space.
  "A fam'd Sur-tout he wears, which once was blue, / And his foot swims in a capacious shoe."
• (transitive) To traverse (a specific body of water, or a specific distance) by swimming; or, to use a specific swimming stroke; or, to compete in a specific swimming event.
  "For exercise, we like to swim laps around the pool."

noun

• (UK) A part of a stream much frequented by fish.
• (figurative) The flow of events; being in the swim of things.
  "With the road ahead now clear, Mann […] is plunging back into the swim of business in a hurry."

verb

• (intransitive) To be dizzy or vertiginous; have a giddy sensation; to have, or appear to have, a whirling motion.
  "My head was swimming after drinking two bottles of cheap wine."

noun

• (Internet slang, text messaging) Abbreviation of someone who isn't me, used as a way to avoid self-designation or self-incrimination, especially in online drug forums.