Question: what hi-fi means? 

Answer: hi-fi \n\n\nHigh fidelity.\n\nAn electronic system for reproducing high-fidelity sound from radio or recordings\n\n\nThe noun hi-fi has 2 meanings:\n\nMeaning #1: equipment for the reproduction of sound with high fidelity\n  Synonym: high fidelity sound system\n\n\nMeaning #2: the reproduction of sound with little or no distortion\n  Synonym: high fidelity
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