Meaning of VIRTUAL in English

— virtuality , n.

/verr"chooh euhl/ , adj.

1. being such in power, force, or effect, though not actually or expressly such: a virtual dependence on charity.

2. Optics.

a. noting an image formed by the apparent convergence of rays geometrically, but not actually, prolonged, as the image formed by a mirror (opposed to real ).

b. noting a focus of a system forming virtual images.

3. temporarily simulated or extended by computer software: a virtual disk in RAM; virtual memory on a hard disk.

[ 1350-1400; ME virtualis, equiv. to L virtu ( s ) VIRTUE + -alis -AL 1 ]

Random House Webster's Unabridged English dictionary.      Полный английский словарь Вебстер - Random House .