A sound reflected or reverberated from a solid body; sound returned; repercussion of sound; as an echo from a distant hill. The sound must seem an echo to the sense.

In fabulous history, a nymph, the daughter of the Air and Tellus, who pined into a sound, for love of Narcissus.

In architecture, a vault or arch for redoubling sounds.

To resound; to reflect sound. The hall echoed with acclamations.

To be sounded back; as echoing noise.

To reverberate or send back sound; to return what has been uttered. Those peals are echoed by the Trojan throng.