Projection

n.	1.
	1.	The act of throwing or shooting forward.
	2.	A jutting out; also, a part jutting out, as of a building; an extension beyond something else.
	3.	The act of scheming or planning; also, that which is planned; contrivance; design; plan.
	4.	(Persp.) The representation of something; delineation; plan; especially, the representation of any object on a perspective plane, or such a delineation as would result were the chief points of the object thrown forward upon the plane, each in the direction of a line drawn through it from a given point of sight, or central point; as, the projection of a sphere. The several kinds of projection differ according to the assumed point of sight and plane of projection in each.
	5.	(Geog.) Any method of representing the surface of the earth upon a plane. Conical projection a mode of representing the sphere, the spherical surface being projected upon the surface of a cone tangent to the sphere, the point of sight being at the center of the sphere. Cylindric projection a mode of representing the sphere, the spherical surface being projected upon the surface of a cylinder touching the sphere, the point of sight being at the center of the sphere. Globular See under Globular, Gnomonic, etc. Mercator's projection a mode of representing the sphere in which the meridians are drawn parallel to each other, and the parallels of latitude are straight lines whose distance from each other increases with their distance from the equator, so that at all places the degrees of latitude and longitude have to each other the same ratio as on the sphere itself. Oblique projection a projection made by parallel lines drawn from every point of a figure and meeting the plane of projection obliquely. Polar projection a projection of the sphere in which the point of sight is at the center, and the plane of projection passes through one of the polar circles. Powder of projection (Alchemy.) a certain powder cast into a crucible or other vessel containing prepared metal or other matter which is to be thereby transmuted into gold. Projection of a point on a plane (Descriptive Geom.) the foot of a perpendicular to the plane drawn through the point. Projection of a straight line of a plane the straight line of the plane connecting the feet of the perpendiculars let fall from the extremities of the given line.

Noun	1.	projection - a prediction made by extrapolating from past observations
	2.	projection - the projection of an image from a film onto a screen
	3.	projection - a planned undertaking Synonyms: project
	4.	projection - any structure that branches out from a central support
	5.	projection - any solid convex shape that juts out from something
	6.	projection - (psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else
	7.	projection - the acoustic phenomenon that gives sound a penetrating quality; "our ukuleles have been designed to have superior sound and projection"; "a prime ingredient of public speaking is projection of the voice" Synonyms: acoustic projection, sound projection
	8.	projection - the representation of a figure or solid on a plane as it would look from a particular direction
	9.	projection - the act of projecting out from something Synonyms: jutting, protrusion, jut
	10.	projection - the act of expelling or projecting or ejecting Synonyms: ejection, forcing out, expulsion

(theory)

projection - In domain theory, a function, f, which is (a) idempotent, i.e. f(f(x))=f(x) and (b) whose result is no more defined than its argument. E.g. F(x)=bottom or F(x)=x. In reduction systems, a function which returns some component of its argument. E.g. head, tail, \ (x,y) . x. In a graph reduction system the function can just return a pointer to part of its argument and does not need to build any new graph.

Lambert conformal projection, Mercator projection, Miller projection, acting, actualization, aeronautical chart, alienation, alphabet, archery, art, astronomical chart, atlas, autism, autistic thinking, avoidance mechanism, azimuthal equidistant projection, azimuthal projection, bas-relief, beetling, bellying, blame-shifting, blueprint, boldness, brouillon, buffoonery, bulge, bulging, bump, bunch, business, calculation, cartographer, cartography, cartoon, casting, celestial chart, celestial globe, charactering, characterization, chart, choreography, chorographer, chorography, chucking, climatic chart, cog, comb, compensation, conic projection, contour line, contour map, conventional representation, copy, crag, cylindrical projection, dance notation, decompensation, defense mechanism, delineation, demonstration, depiction, depictment, dereism, dereistic thinking, design, diagram, displacement, display, dissociation, draft, drama, drawing, ebauche, elevation, embossment, eminence, emotional insulation, enactment, escape, escape into fantasy, escape mechanism, escapism, esquisse, estimate, excrescence, excrescency, exemplification, exhibit, exhibition, exposition, exposure, extension, exteriorization, externalization, extrapolation, extrusion, fang, fantasizing, fantasy, figuration, figure, firing, flange, flight, flinging, forecast, gag, game plan, general reference map, gibbosity, gibbousness, globe, gnomonic projection, graph, graphic scale, grid line, ground plan, gunnery, hachure, ham, hammy acting, harrow, heaving, heliographic chart, hieroglyphic, high relief, hoke, hokum, hook, house plan, hurling, hydrographic chart, ichnography, iconography, ideogram, illustration, imagery, imaging, impendence, impendency, impersonation, index, isolation, isoline, jaculation, jag, jut, jutting, knob, latitude, layer tint, ledge, legend, letter, limning, lobbing, logogram, logograph, longitude, low relief, map, map maker, map projection, mapper, mapping, meridian, mimesis, mimicking, mimicry, miming, mummery, musical notation, musketry, negativism, notation, objectification, opening, ostentation, outcropping, outline, outlining, overacting, overcompensation, overhang, overhanging, pantomiming, parallel, patter, pattern, peak, pecten, performance, performing, personation, photogrammetrist, photogrammetry, photomap, phototopography, physical map, pictogram, picturization, pitching, plan, planning, playacting, playing, plot, point, political map, polyconic projection, portraiture, portrayal, prediction, prefigurement, presentation, presenting, presentment, printing, production, profile, prognostication, project, prolongation, prominence, proposal, proposition, prospectus, protrusion, protuberance, protuberancy, psychotaxis, rake, ratchet, rationalization, realization, reckoning, relief, relief map, rendering, rendition, representation, representative fraction, resistance, retrospective, ridge, road map, rough, salience, salient, sawtooth, scale, scenario, schema, scheme, score, script, shooting, show, showing, sinusoidal projection, skeet, skeet shooting, skeleton, sketch, slapstick, slinging, snag, snaggle, sociological adjustive reactions, special map, spine, spire, sprocket, spur, stage business, stage directions, stage presence, steeple, stunt, sublimation, substitution, swelling, syllabary, symbol, tablature, table, taking a role, terrain map, terrestrial globe, thematic map, throwing, tooth, topographer, topographic chart, topography, trajection, transportation map, trapshooting, tuberosity, tuberousness, unfolding, unfoldment, unveiling, varnishing day, vernissage, weather chart, weather map, wish-fulfillment fantasy, wishful thinking, withdrawal, working drawing, writing