When a doctor sets a broken bone, he or she puts it into the right position so that it will heal. When a broken bone sets, it heals in a particular position.
- To put in a specified position or arrangement; place: set a book on a table; set the photo next to the flowers. 2. a. To put into a specified state: set the prisoner at liberty; set the house ablaze; set the machine in motion. b. To cause to begin an action: The noise set the dog to barking.