1. [n]  the act of swimming
2. [v]  be afloat; stay on a liquid surface; not sink
3. [v]  travel through water; "We had to swim for 20 minutes to reach the shore"

Swim
Swim

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1. \Swim\, v. i. [imp. {Swam}or {Swum}; p. p. {Swum}; p. pr. &
   vb. n. {Swimming}.] [AS. swimman; akin to D. zwemmen, OHG.
   swimman, G. schwimmen, Icel. svimma, Dan. sw["o]mme, Sw.
   simma. Cf. {Sound} an air bladder, a strait.]
   1. To be supported by water or other fluid; not to sink; to
      float; as, any substance will swim, whose specific gravity
      is less than that of the fluid in which it is immersed.
   2. To move progressively in water by means of strokes with
      the hands and feet, or the fins or the tail.
            Leap in with me into this angry flood, And swim to
            yonder point.                         --Shak.
   3. To be overflowed or drenched. --Ps. vi. 6.
            Sudden the ditches swell, the meadows swim.
                                                  --Thomson.
   4. Fig.: To be as if borne or floating in a fluid.
            [They] now swim in joy.               --Milton.
   5. To be filled with swimming animals. [Obs.]
            [Streams] that swim full of small fishes. --Chaucer.
   

2. \Swim\, v. t.
   1. To pass or move over or on by swimming; as, to swim a
      stream.
            Sometimes he thought to swim the stormy main.
                                                  --Dryden.
   2. To cause or compel to swim; to make to float; as, to swim
      a horse across a river.
   3. To immerse in water that the lighter parts may float; as,
      to swim wheat in order to select seed.
   

3. \Swim\, n.
   1. The act of swimming; a gliding motion, like that of one
      swimming. --B. Jonson.
   2. The sound, or air bladder, of a fish.
   3. A part of a stream much frequented by fish. [Eng.]
   {Swim bladder}, an air bladder of a fish.
   {To be in the swim}, to be in a favored position; to be
      associated with others in active affairs. [Colloq.]
   

4. \Swim\, v. i. [OE. swime dizziness, vertigo, AS. sw[=i]ma;
   akin to D. zwijm, Icel. svimi dizziness, svina to subside,
   sv[=i]a to abate, G. schwindel dizziness, schwinden to
   disappear, to dwindle, OHG. sw[=i]nan to dwindle. Cf.
   {Squemish}, {Swindler}.]
   To be dizzy; to have an unsteady or reeling sensation; as,
   the head swims.