All 3 Uses

virtual
in
American Sniper
(Edited)

The gun was super-easy to handle, and was virtually interchangeable with the M-4, which, though not a sniper weapon, is still a valuable combat tool.
p. 114.5 *

virtually = almost completely
The Mahdi army was out there, and the area was a virtual no-go zone for Americans.
p. 392.3

virtual = to effectively be something without entirely being it
It used virtual reality to test what sorts of effects battle has on your body.
p. 408.1 *

virtual reality = simulated by a computer

Definitions:

(1) (virtual as in: virtual organization)
to almost be something; or to effectively be something without entirely being it in a traditional sense
(2) (virtual as in: computer's virtual world)
something simulated by a computer
(3) (meaning too rare to warrant focus)