<p><strong>Noun</strong></p><ul><li>a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface.</li><li>a sound heard again near its source after being reflected.</li><li>any repetition or close imitation, as of the ideas or opinions of another.</li><li>a person who reflects or imitates another.</li><li>a sympathetic or identical response, as to sentiments expressed.</li><li>a lingering trace or effect.</li><li>(initial capital letter) Classical Mythology. a mountain nymph who pined away for love of the beautiful youth Narcissus until only her voice remained.</li><li>Cards. the play of a high card and then a low card in the suit led by one's partner as a signal to continue leading the suit, as in bridge, or to lead a trump, as in whist.</li><li>Electronics. the reflection of a radio wave, as in radar or the like.</li><li>(initial capital letter) U.S. Aerospace. one of an early series of inflatable passive communications satellites.</li><li>a word used in communications to represent the letter E.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to emit an echo; resound with an echo: The hall echoed with cheers.</li><li>Synonyms: reverberate, ring</li><li>to be repeated by or as by an echo: Shouts echoed through the street.</li><li>Synonyms: reverberate, ring</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to repeat by or as by an echo; emit an echo of: The hall echoes the faintest sounds.</li><li>to repeat or imitate the words, sentiments, etc., of (a person).</li><li>to repeat or imitate (words, sentiments, etc.).</li></ul>