(computing) made to appear to exist by the use of computer software, for example on the internet. a system to help programmers create virtual environments ... Virtual reality noun · Virtual world noun · Virtual machine noun · Virtually adverb

made to appear to exist by the use of computer software, for example on the Internet New technology has enabled development of an online “virtual library.”

There are 16 meanings listed in OED's entry for the word virtual, five of which are labelled obsolete. See 'Meaning & use' for definitions, usage, and ...

images and sounds created by a computer that seem almost real to the user, who can interact with them by using sensors

noun [uncountable] (abbreviation VR) images created by a computer that appear to surround the person looking at them and seem almost real.

used by a computer to create a world where people can communicate with each other, play games and pretend to live another life.

used by a computer to create a world where people can communicate with each other, play games, and pretend to live another life.

There is one meaning in OED's entry for the noun virtual corporation. See 'Meaning & use' for definition, usage, and quotation evidence.

​almost or very nearly, so that any slight difference is not important. to be virtually impossible; Virtually all students will be exempt from the tax.

a feature of a computer's operating system that allows multiple other systems to be run on the same computer, each with its own operating environment.