hour ‧ glass /ˈaʊəɡlɑːs $ ˈaʊrɡlæs/ BrE AmE noun [countable]
1 . a glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one hour ⇨ egg-timer
2 . hourglass figure a woman who has an hourglass figure has a narrow waist in comparison with her chest and ↑ hip s