Definition of virtual per Webster’s Dictionary:
1: being such in essence or effect though not formally recognized or admitted a virtual dictator;
2: being on or simulated on a computer or computer network, print or virtual books, a virtual keyboard: such as a) occurring or existing primarily online virtual shopping b) of, relating to, or existing within a virtual reality a virtual tour;
3: of, relating to, or using virtual memory;
4: of, relating to, or being a hypothetical particle whose existence is inferred from indirect evidence virtual photons.