(1):

(n.) Pertaining to the art, or in accordance with the laws, of perspective.

(2):

(a.) A glass through which objects are viewed.

(3):

(a.) That which is seen through an opening; a view; a vista.

(4):

(n.) Of or pertaining to the science of vision; optical.

(5):

(a.) The effect of distance upon the appearance of objects, by means of which the eye recognized them as being at a more or less measurable distance. Hence, aerial perspective, the assumed greater vagueness or uncertainty of outline in distant objects.

(6):

(a.) The art and the science of so delineating objects that they shall seem to grow smaller as they recede from the eye; - called also linear perspective.

(7):

(a.) A drawing in linear perspective.