Definition of hourglass noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈaʊəɡlɑːs//
; NAmE NAmE//ˈaʊərɡlæs//
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a glass container holding sand that takes exactly an hour to pass through a small opening between the top and bottom sections compare egg timer
See the Oxford Advanced American Dictionary entry: hourglass

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