1
- a large or dense group of insects, especially flying ones一大群昆虫（尤指飞行的昆虫）。
1.1
- a large number of honeybees that leave a hive en masse with a newly fertilized queen in order to establish a new colony离巢的蜂群, 分蜂群。
1.2
a swarm/swarms of
a large number of people or things一大群人（或物）：a swarm of journalists.
一大群记者。
1.3
- a series of similar-sized earthquakes occurring together, typically near a volcano（多指发生在火山附近的）地震群。
1.4
- Astronomy a large number of minor celestial objects occurring together in space, especially a dense shower of meteors【天文】一大群小型天体同时在空中出现（尤指流星雨）。
1
- no obj.(of insects) move in or form a swarm（昆虫）成群地飞：
as adj. swarming swarming locusts.成群结队飞行的蝗虫。
1.1
- (of honeybees, ants, or termites) issue from the nest in large numbers in order to mate and found new colonies（蜜蜂, 蚂蚁, 白蚁）分群：
the bees had swarmed and left the hive.
蜜蜂已分群, 并离开了蜂巢。
2
- no obj., with adverbial move somewhere in large numbers蜂拥：
protesters were swarming into the building.
抗议者们蜂拥着冲进大楼。
2.1
swarm with
(of a place) be crowded or overrun with (moving people or things)（人或物）密集; 云集：the place was swarming with police.
这个地方警察云集。
词源
Old English swearm (noun), of Germanic origin; related to German Schwarm, probably also to the base of Sanskrit svarati 'it sounds'.
短语动词
swarm up
- climb (something) rapidly by gripping it with one's hands and feet, alternately hauling and pushing oneself upwards攀; 爬：
I swarmed up the mast.
我爬上了桅杆。