Englishfor English speakers
virtual
Adjective
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A virtual world, tour, address, etc. is one that is made to look like or replace a real one, usually using a computer.
He is the designer of three of the top virtual reality games.
They study educational uses of online virtual worlds.
There are vital virtual communities forming and re-forming out there on the Internet all the time.
There's no way to create virtual smell or taste.
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A virtual monopoly, certainty, disappearance, etc. is a one that is close to 100%.
Google has a virtual monopoly on web searches.
xi
Noun
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Xi is the name of the 14th letter in the Greek alphabet.
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Ξξ