(Christianity) A theology that stresses the importance of the decision to become a Christian for salvation. Often this decision takes the form of the sinner's prayer.

(intransitive) To decide.

A decisionmaker's conception of what will happen as the outcome of a decision.

(sports) A decision about the conduct of a sporting event, usually one made by the coach regarding which players will start or will play, or which strategy will be employed, which is put off until the start of the game itself.

The process of economic agents aiming to maximise their objectives, by ensuring the marginal benefit of an action is equal to its marginal cost.