1.a. The act of making or arriving at a decision. b. The decision reached. 2.a. Firmness of purpose; resolve: approached the task with determination and energy.b. A fixed intention or resolution: returned to school with a determination to finish.3.a. The settling of a question or case by an authoritative decision or pronouncement, especially by a judicial body:The choice of a foster home was left to the determination of the court.b. The decision or pronouncement made.4.a. The ascertaining or fixing of the quantity, quality, position, or character of something: a determination of the ship's longitude; a determination of the mass of the universe.b. The result of such ascertaining.5. A fixed movement or tendency toward an object or end.