noun Computers.

  1. software that displays advertisements and is integrated into another program offered at no charge or at low cost.
  2. a type of spyware that gathers information about an Internet user’s browsing habits and displays targeted or contextual advertisements.


  1. a type of computer software that collects information about a user’s browsing patterns in order to display relevant advertisements in his or her Web browser
  2. computer software that is given to a user with advertisements already embedded

2000 (earlier as the name of a software company), from ad (n.) + -ware, abstracted from software, etc.

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