to encourage someone to start behaving in an immoral or dishonest way:
Young prisoners are being corrupted by the older, long-term offenders.
They say power corrupts.
to change the traditional form of something, such as a language, so that it becomes worse than it was:
The culture has been corrupted by Western influences.
to change the information in a computer, so that the computer does not work properly any more:
a virus which corrupts the data on your hard drive
—corruptibility noun [uncountable]