Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An instrument for measuring time, consisting of two glass chambers connected by a narrow neck and containing a quantity of sand, mercury, or another flowing substance that trickles from the upper chamber to the lower in a fixed amount of time, often one hour.
  • adj. Shaped like an hourglass: an hourglass design; an hourglass figure.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A clock made of two glass vessels connected with a narrow passage, with sand flowing through that passage.

from the GNU version of the Collaborative International Dictionary of English

  • n. An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running through a small aperture unto the lower.

from The Century Dictionary and Cyclopedia

  • n. An instrument for measuring time, consisting of a glass vessel constricted to a narrow passage in the middle, through which a quantity of sand, or sometimes of mercury, runs from the upper part into the lower in exactly an hour.
  • n. The time measured by an hour-glass; an hour.
  • Having the form of an hour-glass.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a sandglass that runs for sixty minutes

Etymologies

hour +‎ glass (Wiktionary)

Examples

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