Definition of cheat on
- He cheated on his wife/girlfriend.
: to deprive of something valuable by the use of deceit or fraud
: to influence or lead by deceit, trick, or artifice
: to elude or thwart by or as if by outwitting
: the act or an instance of fraudulently deceiving : deception, fraud
: a code (such as a button combination or password) that activates a hidden feature or capability in a computer or video game
: one that cheats : pretender, deceiver
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