Meaning of preregister | Babel Free

Definitions

1. To register for something (especially for a course of education) prior to its start.
   intransitive
2. To register or enroll (a person, especially a student) prior to the start of something.
   transitive
3. To register (a study design and its planned statistical analysis) before the study by reporting (them) in the scientific literature via a registered report.
   intransitive, transitive

CEFR level