Look up virtual in Wiktionary, the free dictionary.

The term virtual is a concept applied in many fields with somewhat differing connotations, and also, differing denotations.

The term has been defined in philosophy as "that which is not real" but may display the salient qualities of the real. Colloquially, 'virtual' is used to mean almost, particularly when used in the adverbial form e.g. "That's virtually [almost] impossible".

This usage of virtual is found in many fields.

In philosophy:

• Virtual (philosophical concept)
• Virtual artifact

In computing:

• Virtual (computing)
  • Virtual machine
  • Virtual reality
  • Virtual facility
  • Virtual globe
  • Virtual world
  • Virtual tour
  • Virtual community
  • Virtual airline
  • Virtual memory
  • Virtual hosting
  • Virtual network
  • Virtual server
  • Virtual printer
  • Virtual keyboard
  • Virtual drive
  • Virtual desktop
  • Virtual appliance
  • Virtual function
  • Virtual file system
  • Virtual folder
  • Virtual synchrony
  • Virtualization

In telecommunications and electronics:

• Virtual channel
• Virtual circuit
• Virtual queue
• Virtual ground

In mathematics, physics, and medicine:

• Virtually
• Virtual particle
• Virtual displacement
• Virtual work
• Virtual screening
• Virtual patient
• Virtual surgery
  • Virtual colonoscopy

In education and business:

• Virtual education
• Virtual school
• Virtual university
• Virtual learning environment
• Virtual museum
• Virtual business
• Virtual economy
• Virtual office
• Virtual team
• Virtual workplace
• Virtual tradeshow
• Virtual water

In entertainment and recreation:

• Virtual sex
• Virtual actor
• Virtual band
• Virtual studio
• Virtual art