enroll
v.v. to officially join a school, a course, or a group. You usually have to fill out a form or pay a fee to do this.
v. to officially register as a member of an institution or a participant in a course. Often implies a formal administrative process.
I want to enroll in a photography class this summer.
Students must enroll in their chosen modules at least two weeks before the semester begins to secure a place.
The university saw a significant increase in international students who chose to enroll in the engineering program following the recent curriculum overhaul.
From Middle English enrollen, from Anglo-Norman enroller; by surface analysis, en- + roll.
The verb is often followed by the preposition 'in' (US) or 'on' (UK).
I enrolled the courseI enrolled in the courseWhen joining a course or program, the verb requires a preposition, usually 'in' or 'on'.