Noun

(en noun)

Something which projects, protrudes, juts out, sticks out, or stands out.

The face of the cliff had many projections which are big enough for birds to nest on.

The action of projecting]] or throwing or [[propel, propelling something.

The display of an image by devices such as movie projector, video projector, overhead projector or slide projector.

A forecast or prognosis obtained by extrapolation

(psychology) A belief or assumption that others have similar thoughts and experiences as oneself

(photography) The image that a translucent object casts onto another object.

(cartography) Any of several systems of intersecting lines that allow the curved surface of the earth to be represented on a flat surface. The set of mathematics used to calculate coordinate positions.

(geometry) An image of an object on a surface of fewer dimensions.

(linear algebra) An idempotent linear transformation which maps vectors from a vector space onto a subspace.

(mathematics) A transformation which extracts a fragment of a mathematical object.

(category theory) A morphism from a categorical product to one of its (two) components.

Noun

(wikipedia ridge) (en noun)

(lb) The back of any animal; especially the upper or projecting part of the back of a quadruped.

:(Hudibras)

Any extended protuberance; a projecting line or strip.

The line along which two sloping surfaces meet which diverge towards the ground.

*

*:It was not far from the house; but the ground sank into a depression there, and the ridge of it behind shut out everything except just the roof of the tallest hayrick. As one sat on the sward behind the elm, with the back turned on the rick and nothing in front but the tall elms and the oaks in the other hedge, it was quite easy to fancy it the verge of the prairie with the backwoods close by.

The highest point on a roof, represented by a horizontal line where two roof areas intersect, running the length of the area.

*{{quote-book, year=1907, author=

, chapter=26, title= The Dust of Conflict , passage=Maccario, it was evident, did not care to take the risk of blundering upon a picket, and a man led them by twisting paths until at last the hacienda rose blackly before them. Appleby could see it dimly, a blur of shadowy buildings with the ridge of roof parapet alone cutting hard and sharp against the clearing sky.}}

(lb) The highest portion of the glacis proceeding from the salient angle of the covered way.

:(Stocqueler)

A chain of mountains.

*(William Shakespeare) (1564-1616)

*:the frozen ridges of the Alps

A chain of hills.

A long narrow elevation on an ocean bottom.

(lb) A type of warm air that comes down on to land from mountains.