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.
case
Noun
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A case is a container to hold something.
He opened the case and pulled out his violin.
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A case is a matter for police or in court.
The judge did not accept his case.
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A case is the form of a noun showing how it is used in a sentence.
The word "he" is in the subject or nominative case.
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A case is a person of a certain kind.
That man is sure a hard case.
case
Verb
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If a police officer cases a house, he or she watches it until something happens.
We were casing a house all night in Brooklyn.