n.[C]

1. 滤器；多孔过滤材料
   This is a coffee filter.

   这是咖啡过滤器。

2. 滤光器；滤波器；滤光镜
3. 【口】有滤嘴的香烟

vt.

1. 过滤
   The water was filtered through charcoal.

   这水是通过炭来过滤的。

2. 滤除[（+off/out）]
3. 使漏过；使漏出

vi.

1. 滤出
2. 透过，渗透；（消息等）走漏；（人群等）慢慢移动[Q]
   News of the defeat filtered through.

   失败的消息走漏了出来。

   Sunlight filtered through the leaves.

   阳光透过了树叶。

n.

1. a porous device for removing impurities or solid particles from a liquid or gas passed through it.
   ▸a screen, plate, or layer which absorbs some of the light passing through it.
   ▸a device for suppressing electrical or sound waves of frequencies not required.
2. Brit. an arrangement whereby vehicles may turn left (or right) while other traffic waiting to go straight ahead or turn right (or left) is stopped by a red light.
3. Computing  a piece of software that processes data before passing it to another application, for example to remove unwanted material.

v.

1. pass through a filter.
2. (often filter in/out/through) move or pass into something slowly or gradually.
   ▸(of information) gradually become known.