In effect or essence, rather than in fact or reality; also, imitated, simulated. • For practical purposes, though not technically; almost complete, very near. • Operating using a computer and/or online rather than physically present. • Simulated in a computer and/or online. • Of a class member: capable of being overridden with a different implementation in a subclass. • 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. • Pertaining to a theoretical quality of something which would produce an observable effect if counteracting factors such as friction are disregarded; specifically, of a head of water: producing a certain pressure if friction, etc., is disregarded. • Chiefly in virtual focus: of a focus or point: from which light or other radiation apparently emanates; also, of an image: produced by light that appears to diverge from a point beyond the reflecting or refracting surface. • Pertaining to particles in temporary existence due to the Heisenberg uncertainty principle. • Of a quantum state: having an intermediate, short-lived, and unobservable nature. • Having efficacy or power due to some natural qualities. • Of a plant or other thing: having strong healing powers; virtuous. • Having the power of acting without the agency of some material or measurable thing; possessing invisible efficacy. • Producing, or able to produce, some result; effective, efficacious. • Synonym of virtuous (“full of virtue; having excellent moral character”).