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[pruh-jek-shuh n] /prəˈdʒɛk ʃən/
a projecting or protruding part.
Synonyms: overhang, protrusion, jut.
the state or fact of jutting out or protruding.
a causing to jut or protrude.
the act, process, or result of projecting.
Also called map projection. Cartography. a systematic construction of lines drawn on a plane surface representative of and corresponding to the meridians and parallels of the curved surface of the earth or celestial sphere.
  1. the act of reproducing on a surface, by optical means, a remote image on a film, slide, etc.
  2. an image so reproduced.
the act of visualizing and regarding an idea or the like as an objective reality.
something that is so visualized and regarded.
calculation of some future thing:
They fell short of their projection for the rate of growth.
the act of communicating distinctly and forcefully to an audience.
  1. the tendency to ascribe to another person feelings, thoughts, or attitudes present in oneself, or to regard external reality as embodying such feelings, thoughts, etc., in some way.
  2. Psychoanalysis. such an ascription relieving the ego of a sense of guilt or other intolerable feeling.
the act of planning or scheming.
Alchemy. the casting of the powder of philosophers' stone upon metal in fusion, to transmute it into gold or silver.
Origin of projection
1470-80; < Latin prōjectiōn- (stem of prōjectiō) a throwing forward. See project, -ion
Related forms
[pruh-jek-shuh-nl] /prəˈdʒɛk ʃə nl/ (Show IPA),
nonprojection, noun
self-projection, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for projection
Contemporary Examples
Historical Examples
  • We merely attribute this value to the object by a projection which is the ground of the apparent objectivity of beauty.

    The Sense of Beauty George Santayana
  • It is a piece of wood with a projection at the end, in which the base of the arrow is secured.

    The Western World W.H.G. Kingston
  • This projection of the astral body, as a rule, occurs only when the physical body is stilled in sleep, or in trance condition.

  • He slipped the cylinder over a projection, and wound the mechanism.

    Mountain Blood Joseph Hergesheimer
  • And the cause is that while our inclinations represent a heritage from the past, our ideals are a projection into the future.

    Theism or Atheism Chapman Cohen
British Dictionary definitions for projection


the act of projecting or the state of being projected
an object or part that juts out
the representation of a line, figure, or solid on a given plane as it would be seen from a particular direction or in accordance with an accepted set of rules
a scheme or plan
a prediction based on known evidence and observations
  1. the process of showing film on a screen
  2. the image or images shown
  1. the belief, esp in children, that others share one's subjective mental life
  2. the process of projecting one's own hidden desires and impulses See also defence mechanism
the mixing by alchemists of powdered philosopher's stone with molten base metals in order to transmute them into gold
Derived Forms
projectional, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for projection

late 15c., in alchemy, "transmutation by casting a powder on molten metal; 1550s in the cartographical sense "drawing of a map or chart according to scale," from Middle French projection, from Latin proiectionem (nominative proiectio), from past participle stem of proicere (see project (n.)). From 1590s as "action of projecting."

Online Etymology Dictionary, © 2010 Douglas Harper
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projection in Medicine

projection pro·jec·tion (prə-jěk'shən)

  1. The act of projecting or the condition of being projected.

  2. The attribution of one's own attitudes, feelings, or suppositions to others.

  3. The attribution of one's own attitudes, feelings, or desires to someone or something as a naive or unconscious defense against anxiety or guilt.

  4. The localization of visual impressions to a point in space relative to the person who is doing the viewing: straight ahead, right, left, above, or below.

  5. Any of the systems of nerve fibers by which a group of nerve cells discharges its nerve impulses to one or more other cell groups.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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projection in Science
  1. The image of a geometric figure reproduced on a line, plane, or surface.

  2. A system of intersecting lines, such as the grid of a map, on which part or all of the globe or another spherical surface is represented as a plane surface. See more at azimuthal projection, conic projection, cylindrical projection.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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