the world > physical sensation > sight and vision > optical instruments > magnification or magnifying instruments > [noun] > magnification (3)
The action of magnifying something; an instance of this.
The apparent enlargement of an object as seen through a lens, optical instrument, etc.; spec. the ratio of the apparent size of an image formed by…
the capacity of a lens for increasing the apparent size of an object; = magnification, n. 3a.