echo

Concise Oxford English Dictionary © 2008 Oxford University Press:
echo/ˈekəʊ/

▶noun (pl. echoes)

• 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.

▶verb (echoes, echoing, echoed)

• 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.

– derivatives
echoer noun,
echoey adjective,
echoless adjective.

– origin ME: from OFr. or L., from Gk ēkhō, rel. to ēkhē ‘a sound’.