(swôrm) noun
1. A large number or body of insects or small living things of any kind.
2. A hive of bees; also, a large number of bees leaving the parent stock at one time, to take up new lodgings, accompanied by a queen.
3. A crowd or throng of persons, animals, or things, especially when in motion or advancing under pressure.
4. Biol. A collection of free–swimming unicellular organisms, especially zoospores. See synonyms under FLOCK.
—v.i.
1. To leave the hive in a swarm: said of bees.
2. To come together, move, or occur in great numbers.
3. To be crowded or overrun; teem: with with.
4. Biol. To come forth in a swarm.
—v.t.
5. To fill with a swarm or crowd; throng. [OE swearm]

(swôrm) v.t. & v.i.
To climb (a tree, etc.) by clasping it with the hands and limbs. [Orig. nautical cant. Prob. akin to SWARM¹.]