Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A hole or series of holes punched or bored through something, especially a hole in a series, separating sections in a sheet or roll.
  • noun The act of perforating.
  • noun The state of being perforated.

from The Century Dictionary.

  • noun The act of boring or piercing through.
  • noun A hole bored; any hole or aperture passing through anything, or into the interior of a substance.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of perforating, or of boring or piercing through.
  • noun A hole made by boring or piercing; an aperture.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun the act of perforating or the state of being perforated
  • noun any opening in a solid object
  • noun medicine an abnormal opening in an organ, such as a rupture
  • noun a series of holes punched through something in order to assist in separating parts
  • noun mathematics that portion of a surface that remains after an open disk is removed from it

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

  • noun a line of small holes for tearing at a particular place
  • noun the act of punching a hole (especially a row of holes as for ease of separation)
  • noun a hole made in something

Etymologies

Sorry, no etymologies found.

Examples

  • They have them now where the perforation is not visible.

    Logo-rhythmic

  • Both values were printed on the wove paper used for the other denominations then current and the perforation was the usual 12 made by single-line machines.

    The Stamps of Canada

  • The perforation was the regulation gauge of 12, which has been in continuous use since 1858, and, as the _Philatelic Record_ stated when first chronicling the issue, "many of the stamp are badly centered, a characteristic defect of the American Bank Note Company's work."

    The Stamps of Canada

  • The perforation is the usual 12 and specimens are known entirely imperforate.

    The Stamps of Canada

  • When the peritoneum is eaten through it is called perforation, for it means that there is an opening into the peritoneal cavity, and, unless the cavity is cut into, cleaned and properly drained death will take place in a very short time.

    Appendicitis

  • Immediately below the aperture of the perforation is the egg chamber: a short, tunnel-shaped cavity which occupies almost the whole distance between one opening and that lying below it.

    Social Life in the Insect World

  • Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

    The Earth Times Online Newspaper

  • Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

    StreetInsider.com News Articles

  • Gastrointestinal (GI) perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

    NewsBlaze.com Current News - Top Stories

  • GI perforation: Treatment with Avastin can result in the development of a potentially serious side effect called GI perforation, which is the development of a hole in the stomach, small intestine or large intestine.

    Business Wire Travel News

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