n.

1. 回声；回响[C][U]
   This wall is famous for producing echoes.

   这墙壁因能发出回声而出名。

2. （舆论等的）反应；共鸣[U][C]
   His words aroused no echo in their hearts.

   他的话未能在他们心中引起共鸣。

3. 重复；仿效[U][C]
4. 附和者；应声虫[C]
   The young man is only an echo of his mother's opinions.

   那个年轻人只不过是他母亲意见的附和者。

vi.

1. 发出回声，产生回响[（+with/to）]
   The hall echoed with the audience's laughter.

   大厅里回响着观众们的笑声。

   His shout echoed across the valley.

   他的喊声在山谷回荡。

2. 重复他人的话（或行动等）

vt.

1. 反射（声音等）
2. 重复（他人的话等）
   He is always echoing what his boss says.

   他老是重复他老板的话。

n.

1. a sound caused by the reflection of sound waves from a surface back to the listener.
   ▸a reflected radio or radar beam.
   ▸Linguistics  the repetition of one speaker's utterance by another.
2. something suggestive of or parallel to something else.
3. Bridge  a play by a defender of a higher card in a suit followed by a lower one in a subsequent trick, used as a signal to request a further lead of that suit by their partner.
4. a code word representing the letter E, used in radio communication.

v.

1. (of a sound) reverberate or be repeated after the original sound has stopped.
   ▸repeat (someone's words or opinions).
2. be suggestive of or parallel to:
   a blue suit that echoed the colour of her eyes.