Echo

n. & v.
—n. (pl. -oes)
1 a the repetition of a sound by the reflection of sound waves. b the secondary sound produced.
2 a reflected radio or radar beam.
3 a close imitation or repetition of something already done.
4 a person who slavishly repeats the words or opinions of another.
5 (often in pl.) circumstances or events reminiscent of or remotely connected with earlier ones.
6 Bridge etc. a conventional mode of play to show the number of cards held in the suit led etc.
—v. (-oes, -oed)
1 intr. a (of a place) resound with an echo. b (of a sound) be repeated; resound.
2 tr. repeat (a sound) by an echo.
3 tr. a repeat (another's words). b imitate the words, opinions, or actions of (a person).
Phrases and idioms:
echo chamber an enclosure with sound-reflecting walls. echo location the location of objects by reflected sound. echo-sounder sounding apparatus for determining the depth of the sea beneath a ship by measuring the time taken for an echo to be received. echo-sounding the use of an echo-sounder. echo verse a verse form in which a line repeats the last syllables of the previous line.
Derivatives:
echoer n. echoless adj.
Etymology: ME f. OF or L f. Gk ekho, rel. to ekhe a sound