what is echo explain in 2lines
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a repetition of sound produced by the reflection of sound waves from a wall, mountain, or other obstructing surface. a sound heard again near its source after being reflected. any repetition or close imitation, as of the ideas or opinions of another.
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An echo is a sound which is caused by a noise being reflected off a surface such as a wall. He listened and heard nothing but the echoes of his own voice in the cave. [ + of] Synonyms: reverberation, ringing, repetition, answer More Synonyms of echo
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