v.1. To separate and reserve something for a special purpose: We set aside some time to discuss the new project. The developer set two acres aside for a park.
2. To discard or reject something: He set aside his concerns and allowed his child to go on the field trip. She set her fears aside and continued down the dark trail.
3. To declare something invalid; annul or overrule something: The judge set aside a lower court ruling. The appellate court set the conviction aside, and the prisoner was released.