n.

1. 收集，采集；收取[U][C]
   The collection of these stamps took ten years.

   收集这些邮票花了十年时间。

2. 收藏品，搜集的东西[C]
   He has a very good collection of foreign coins.

   他收藏着不少外国硬币。

3. 募捐；募集的钱[C]
   take up a collection

   募款

4. 聚集；积聚；大量，大堆[C][S1][（+of）]
   There is a collection of dust in an unused room.

   空着不用的房间常常积起大量灰尘。

n.

1. the action or process of collecting.
   ▸a regular removal of mail for dispatch or of refuse for disposal.
   ▸an instance of collecting money, as in a church service.
2. a group of things collected or accumulated.
3. (collections) Brit. college examinations held at the beginning or end of a term, especially at Oxford University.