To make great, or greater; to increase the dimensions of; to amplify; to enlarge, either in fact or in appearance; as, the microscope magnifies the object by a thousand diameters.
To have the power of causing objects to appear larger than they really are; to increase the apparent dimensions of objects; as, some lenses magnify but little.
To cause an image to appear larger or smaller than the corresponding object. When we look through a lens, we often see things magnified: convex lenses often magnify objects larger, while concave lenses always magnify objects smaller. Mirrors can also magnify objects.