I. prəˈjekshən, prōˈ- noun
( -s )
Etymology: Middle French, from Latin projection-, projectio, from projectus (past participle of proicere, projicere to throw forth, throw down, stretch out, jut out, from pro- forward, down + -icere, jicere, from jacere to throw) + -ion-, -io -ion — more at pro- , jet
1. : a systematic presentation of intersecting coordinate lines on a flat surface upon which features from the curved surface of the earth or the celestial sphere may be mapped — compare conic projection , cylindrical projection , gnomonic projection , mercator projection , orthographic projection , stereographic projection
2.
a. : the casting by an alchemist of a powder into a crucible containing a metal to effect its transmutation
b. : a transforming change
3.
a. : the act of throwing or shooting forward : ejection
watched the projection of the arrow
b. : the state of being thrown or shot forward
4.
a. : the forming of a plan : scheming
b. : something that is planned : design
5. : the representation of something against a background (as an image or shadow)
6.
a.
(1) : a jutting out or causing to jut out
(2) : a part that projects or juts out : an extension beyond something else
projection of earth above its natural level — Thomas Hardy
projections … in the corners reveal the heavy timber framework — American Guide Series: Michigan
b. : a view of a building or architectural element (as a front elevation) — used especially of architectural drawings
7.
a. : the operation of projecting
b. : the picture so formed — see axonometric projection , oblique projection , orthographic projection , trimetric projection
c. : a segment joining the projections of the ends of a given segment upon a given line or plane
d. : the foot of a perpendicular from a point upon a line or plane
8.
a.
(1) : the act of perceiving a mental object as spatially and sensibly objective or of objectifying what is primarily subjective
(2) : a mental object or image so perceived
writing from experience or from an imaginative projection of experience — Malcolm Cowley
b. : the act of externalizing: as
(1) : the spontaneous localization of a sensory impression or memory image either upon the surface of the body or outside in space
the projection of an afterimage upon a wall
(2) : the attribution to other people and to objects of one's own ideas, feelings, or attitudes ; especially : the externalization of blame, guilt, or responsibility for one's thoughts or actions as an unconscious mechanism to defend the ego against anxiety
delusions of persecution are based on the mechanism of projection
9.
a. : the display of motion pictures by projecting an image from them upon a screen for either visual or aural review
b. : the process of projecting the image of a negative or positive for viewing on a screen or for exposing a print on a light-sensitive material
10.
a. : the act of communicating or conveying a vivid image especially to an audience
she excels in genuine stage projection — Stark Young
b. : clarity and distinctness especially of a voice
sings … with the rugged, compelling projection that has brought him such success — J.S.Wilson b.1913
11. : the functional correspondence and connection of parts of the cerebral cortex with parts of the organism
the projection of the retina upon the visual area
12.
a. : the carrying forward of a trend into the future
b. : an estimate of future possibilities based on a current trend
projections of increases in number of households — M.D.Ketchum
II. noun
: the process or technique of reproducing a spatial object upon a plane or curved surface or a line by projecting its points ; also : a graph or figure so formed