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English definition of “hollow”

hollow

adjective (EMPTY)   /ˈhɑl·oʊ/
having an empty space inside or on the surface of an object: a hollow tree His hollow cheeks and paleness made him look ill. If a sound is hollow, it sounds as if it were made by hitting an empty container: the low, hollow rumble of thunder
(Definition of hollow adjective (EMPTY) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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