HyperDic: echo_chamber

English > 1 sense of the expression echo chamber:
NOUNartifactecho chamberan enclosed space for producing reverberation of a sound
English > echo chamber: 1 sense > noun 1, artifact
MeaningAn enclosed space for producing reverberation of a sound.
BroaderenclosureA structure consisting of an area that has been enclosed / enclosed for some purpose

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