ech•oˈɛk oʊ(n.; v.)(pl.)ech•oes

1. (n.)a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface.

2. a sound heard again near its source after being reflected.

3. any repetition or close imitation, as of the ideas or words of another.

4. a person who reflects or imitates another.

5. a sympathetic or identical response, as to sentiments expressed.

6. a lingering trace or effect.

7. (cap.) a mountain nymph who pined away for love of Narcissus until only her voice remained.

   Category: Mythology

8. the reflection of a radio wave, as in radar.

   Category: Electronics, Electricity and Magnetism

9. (v.i.)to emit an echo; resound with an echo:

   The hall echoed with cheers.

10. to be repeated by or as if by an echo.

11. (v.t.)to repeat by or as if by an echo; emit an echo of.

12. to repeat or imitate the words, sentiments, etc., of (a person).

13. to repeat or imitate (words, sentiments, etc.).

Origin of echo:

1300–50; ME ecco < L ēchō < Gk, akin to ēchḗ sound

ech′o•less(adj.)