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

a form of spyware that collects information about the computer user’s online behavior in order to display targeted advertisements in the Web browser
Word Origin


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

Any kind of software which is distributed free of charge along with advertisements that are either placed on the web site from which the software is distributed or displayed by the program while it is running.
Nagware might be considered a special case of adware where the program tries to persuade the user to buy a license for the program itself.


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