Definition of spyware
: software that is installed in a computer without the user's knowledge and transmits information about the user's computer activities over the Internet
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
Who Knew?
-
- What is a ruelle?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
Share spyware
Time Traveler for spyware
The first known use of spyware was in 1994
See more words from the same year