virtual: adj. [via the technical term `virtual memory', prob.
from the term `virtual image' in optics] 1. Common alternative to
logical; often used to refer to the artificial objects (like
addressable virtual memory larger than physical memory) simulated by
a computer system as a convenient way to manage access to shared
resources. 2. Simulated; performing the functions of something that
isn't really there. An imaginative child's doll may be a virtual
playmate. Oppose real.