a style of engineering drawing in which true dimensions are represented as if projected from infinity on three planes perpendicular to each other, avoiding the effects of perspective
2.
a type of zenithal map projection in which the area is mapped as if projected from infinity, with resulting distortion of scale away from the centre
orthographic projection in American English
a two-dimensional pictorial representation of a three-dimensional object in which the object is shown separately in two or more accurate, scaled-down views, as from the top, front, and side: the views are typically displayed with the top view above and the side view alongside the front view