Source : Webster's Revised Unabridged Dictionary (1913)

Swarm \Swarm\, v. i. [imp. & p. p. {Swarmed}; p. pr. & vb. n.
   {Swarming}.]
   1. To collect, and depart from a hive by flight in a body; --
      said of bees; as, bees swarm in warm, clear days in
      summer.

   2. To appear or collect in a crowd; to throng together; to
      congregate in a multitude. --Chaucer.

   3. To be crowded; to be thronged with a multitude of beings
      in motion.

            Every place swarms with soldiers.     --Spenser.

   4. To abound; to be filled (with). --Atterbury.

   5. To breed multitudes.

            Not so thick swarmed once the soil Bedropped with
            blood of Gorgon.                      --Milton.