1. to register in advance for something, especially a course, event, or service

Examples

• Students must preregister for classes before the semester begins.
• You can preregister for the conference online to get the early bird discount.
• The hospital allows patients to preregister for surgery to save time on the day of the procedure.
• Parents need to preregister their children for summer camp by March 15th.
• The software lets you preregister your product before installation.
• We encourage all attendees to preregister rather than register at the door.