Definition of "virtual"
virtual
/ˈvɜːt͡ʃʊəl/
adjective
not comparable
(mechanics) Pertaining to a theoretical infinitesimal velocity in a mechanical system that does not violate the system's constraints; also, of other physical quantities: resulting from such a velocity.
(physics)
(particle physics) Pertaining to particles in temporary existence due to the Heisenberg uncertainty principle.
(obsolete)
noun
countable and uncountable, plural virtuals