1. To decide, to agree, or to arrange something before it happens: Hayden felt that his life was predetermined to be a football player.

Ben and Beatrice had to predetermine when and where they would be going on their summer vacation.

2. To settle on something or to reach a decision before it is actually completed: Jane and Janet, the organizers of the beauty contest, were predetermining who the winner would be before the actual voting took place.