Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- intransitive verb To climb by gripping with the arms and legs.
- intransitive verb To climb (something) in this manner.
- noun A large number of insects or other small organisms, especially when in motion.
- noun A group of bees, social wasps, or ants, when migrating with a queen to establish a new colony.
- noun An aggregation of persons or animals, especially when in turmoil or moving in mass.
- noun A number of similar geologic phenomena or features occurring closely within a given period or place.
- intransitive verb To move or emerge in a swarm.
- intransitive verb To leave a hive as a swarm. Used of bees.
- intransitive verb To move or gather in large numbers.
- intransitive verb To be overrun; teem: synonym: teem.
- intransitive verb To fill with a crowd.
from The Century Dictionary.
- noun A large number or body of insects or other small creatures, particularly when moving in a confused mass.
- noun Especially, a cluster or great number of honey-bees which emigrate from a hive at once, and seek new lodgings under the direction of a queen; also, a like body of bees settled permanently in a hive.
- noun In general, a great number or multitude; particularly, a multitude of people in motion: often used of inanimate objects: as, a swarm of meteors.
- noun Synonyms Crowd, throng, cluster.
- To move in a swarm or in large numbers, as insects and other small creatures; specifically, to collect and depart from a hive by flight in a body, as bees.
- To appear or come together in a crowd or confused multitude; congregate or throng in multitudes; crowd together with confused movements.
- To be crowded; be overrun; be thronged with a multitude; abound; be filled with a number or crowd of objects.
- To breed multitudes.
- To crowd or throng.
- To cause to breed in swarms.
- To climb a tree, pole, or the like by embracing it with the arms and legs; shin: often with up.
- To climb, as a tree, by embracing it with the arms and legs, and scrambling up.
from the GNU version of the Collaborative International Dictionary of English.
- intransitive verb colloq. To climb a tree, pole, or the like, by embracing it with the arms and legs alternately. See
shin . - transitive verb To crowd or throng.
- noun A large number or mass of small animals or insects, especially when in motion.
- noun Especially, a great number of honeybees which emigrate from a hive at once, and seek new lodgings under the direction of a queen; a like body of bees settled permanently in a hive.
- noun Hence, any great number or multitude, as of people in motion, or sometimes of inanimate objects.
- intransitive verb To collect, and depart from a hive by flight in a body; -- said of bees.
- intransitive verb To appear or collect in a crowd; to throng together; to congregate in a multitude.
- intransitive verb To be crowded; to be thronged with a multitude of beings in motion.
- intransitive verb To abound; to be filled (with).
- intransitive verb To breed multitudes.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A large
number ofinsects , especially when inmotion or (forbees )migrating to a newcolony . - noun A
mass of people or animals inturmoil . - verb intransitive To move as a swarm.
- verb intransitive To
teem , or beoverrun with insects. - verb transitive To fill a place as a swarm.
- verb transitive To
overwhelm as by an opposing army. - verb To
climb bygripping with arms and legs.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- verb move in large numbers
- noun a group of many things in the air or on the ground
- verb be teeming, be abuzz
- noun a moving crowd
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/Share-Alike License
from Wiktionary, Creative Commons Attribution/Share-Alike License
Support

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Examples
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Talk about bringing new meaning to the term "swarm ball."
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They talk a lot about their “research” and “insights,” but pretty much a swarm is the same with a 4e statblock.
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The 13th characteristic of a swarm is its connectedness to the broader world.
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Just a short video to demonstrate how the different bee types in the game are used together in the game, and give some idea of how your swarm is controlled.
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Some of the pellets look bigger and blurrier than the others because they're out of focus — they're trailing behind the main swarm, and they will continue to fall farther and farther behind.
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Eventually new queens and males swarm from the nests and mate.
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Eventually new queens and males swarm from the nests and mate.
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During their flight, another Husker swarm is discovered to in their direct path.
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During their flight, another Husker swarm is discovered to in their direct path.
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This raises the potential for large numbers of Serafinas to be deployed, travelling together in swarm formation, like a school of fish.
bilby commented on the word swarm
"Ernst's fingers were pressed hard on the trigger guard.
the machine gun went off. The swarm of bullets drew half a heart on the plate-glass window. The window cracked and blew in.
It splintered into pieces of glass the size of dinner plates. Just then Kasper heard the wind."
- 'The Quiet Girl', Peter Høeg.
March 19, 2008