Cheating can also be used interchangeably with infidelity, when someone “cheats” on his or her spouse or partner; it means they are involved in an affair with another person in secret. Herein, cheating involves dishonesty since one has made their partner believes they are faithful to them and the fact that they are emotionally or physically involved with someone else constitutes cheating. In this case, it can involve anything from sexual activity to holding hand, kissing or/making out depending on the understating of the parties concerned.
Cheating can also involve using unfair methods to win or gain advantage in a situation that should otherwise be neutral for all. For instance, a student entering the exam room with notes or gaining access to the questions prior to the exam; such individuals are cheating because they increase their chances of outperforming their colleagues, not by working harder, but by manipulating circumstance to make the exam easier for them.
Ultimately, cheating denotes and connotes deliberate dishonesty or deception, and from the examples given, it is clear that cheating is used to give people an unfair advantage, deceive and /or exploit