jealousy
n. a negative emotion in which an individual resents a third party for appearing to take away (or being likely to take away) the affections of a loved one. Jealousy requires a triangle of social relationships between three individuals: the one who is jealous, the partner with whom the jealous individual has or desires a relationship, and the rival who represents a preemptive threat to that relationship. Romantic relationships are the prototypic source of jealousy, but any significant relationship (with parents, friends, etc.) is capable of producing it. It differs from envy in that three people are always involved. See also delusional jealousy. —jealous
adj.