virtual

adjective

• almost or nearly as described, but not completely or according to strict definition:the virtual absence of border controls
• Computing not physically existing as such but made by software to appear to do so:a virtual computerSee also virtual reality.
• carried out, accessed, or stored by means of a computer, especially over a network:a virtual library virtual learning
• Optics relating to the points at which rays would meet if produced backward.
• Physics denoting particles or interactions with extremely short lifetimes and (owing to the uncertainty principle) indefinitely great energies, postulated as intermediates in some processes.