Unfaithfulness, either in the spirit or in the natural; actual adultery. To catch sight that you commit adultery or have an affair, signifies your sexual urges and desires that are longing to be expressed.
Dreaming that your mate, spouse, or significant other is cheating on you, highlights your insecurities and your fears of being abandoned. You may feel some lack of attention in the relationship or that he or she is being less affectionate.
Opponent; enemy; attacker; rival; competitor
Being confronted by an adversary, signifies that you will defend any attacks against your interest.
Dreaming that you overcome an adversary, denotes that you will escape the effects of some serious disaster.