Definitions

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

  • n. A low protective wall or railing along the edge of a raised structure such as a roof or balcony.
  • n. An earthen or stone embankment protecting soldiers from enemy fire. See Synonyms at bulwark.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A low retaining wall.
  • n. Part of a perimeter that extends above the roof.
  • n. A fortification consisting of a wall.

from the GNU version of the Collaborative International Dictionary of English

  • n. A low wall, especially one serving to protect the edge of a platform, roof, bridge, or the like.
  • n. A wall, rampart, or elevation of earth, for covering soldiers from an enemy's fire; a breastwork. See Illust. of Casemate.

from The Century Dictionary and Cyclopedia

  • n. A wall or rampart rising breast-high.
  • n. In architecture, a wall or barrier, either plain or ornamented, placed at the edges of platforms or balconies, roofs of houses, sides of bridges, etc., to prevent people from falling over; also, something resembling such a parapet in appearance or use. See cut under moucharaby.
  • n. In anatomy, the alveolus, or alveolar border of the jawbone, in which the teeth are inserted.

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

  • n. a low wall along the edge of a roof or balcony
  • n. fortification consisting of a low wall

Etymologies

French, from Italian parapetto : parare, to shield; see parasol + petto, chest (from Latin pectus).
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle French parapet. (Wiktionary)

Examples

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