Dilemma refers to a situation in which a difficult choice has to be made between two or more alternatives, especially equally undesirable ones.
Common examples of dilemma include:
1. The prisoner's dilemma - a classic game theory scenario
2. Ethical dilemma - a moral conflict
3. Being on the horns of a dilemma - facing two equally bad options
Fun fact: The word comes from Greek "di-" (two) + "lemma" (proposition).