n.
     - the art of representing three-dimensional objects on a two-dimensional surface so as to convey the impression of height, width, depth, and relative distance. ▸the appearance of viewed objects with regard to their relative position, distance from the viewer, etc.: ![]()  a trick of perspective. 
- a view or prospect.
- a particular way of regarding something.
- understanding of the relative importance of things:![]()  we must keep a sense of perspective about what he's done. 
- an apparent spatial distribution in perceived sound.
Derivative
  
  Etymology
  ME (in the sense ‘optics’): from med. L. perspectiva (ars) ‘(science of) optics’, from perspect-, perspicere ‘look at closely’.