- noun one of two paths chosen as a result of one of two possible answers to a question
- In computers, the determination of a choice or course of action to be taken, based on the particular circumstances and available alternatives. For instance, a computer may compare one set of data to another, to effectuate such a decision. Also called decision.
- A decision whose outcome can have only one of two values, such as 0 or 1, or true or false. Also called Boolean decision.