1. (蜜蜂等昆虫的)一大群，一大窝
    A swarm of bees or other insects is a large group of them flying together.

2. (蜜蜂等)成群飞行
    When bees or other insects swarm, they move or fly in a large group.

    e.g. A dark cloud of bees comes swarming out of the hive.
           黑压压的一大群蜜蜂从蜂巢中飞出来。

3. (人)成群地涌动，蜂拥
    When people swarm somewhere, they move there quickly in a large group.

swarm什么意思

    e.g. People swarmed to the shops, buying up everything in sight.
           人们成群地涌向商店，见什么买什么。

4. (快速移动的)人群
    A swarm of people is a large group of them moving about quickly.

    e.g. A swarm of people encircled the hotel...
           一大群人围住了这个酒店。
    e.g. Today at the crossing there were swarms of tourists taking photographs.
           今天在十字路口有大群的游客在拍照。

5. 挤满，聚集(来来往往的人)
    If a place is swarming with people, it is full of people moving about in a busy way.

    e.g. Within minutes the area was swarming with officers who began searching a nearby wood.
           几分钟内很多警察就来到了这一地区，开始搜查附近的树林。