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English definition of “echo”

echo

noun [C] (SOUND)    /ˈek.əʊ/ US  /-oʊ/ (plural echoes)
C2 a sound that is heard after it has been reflected off a surface such as a wall or a cliff: The echoes of his scream sounded in the cave for several seconds. Thick carpet would reduce the echo in this hallway.Sounds made by objects, movement or impact
(Definition of echo noun (SOUND) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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