the repetition of a sound caused by the reflection of sound waves
the repeated sound due to such reflection
somebody or something that repeats or imitates another
to mistake the echo of a London coffee-house for the voice of the kingdom — Jonathan Swift
a repercussion or result
a trace or vestige
a sympathetic response
something that brings back memories
the reflection by an object of transmitted radar signals
a blip on a radar screen
a soft repetition of a musical phrase
echoey adj
echoless adj
[Middle English ecco via French and Latin from Greek ēchō]