To insert, register, or enter in a list, catalog, or roll (To record or be recorded in a roll or list; to enlist; to make or become a member )
register formally as a participant or member; "The party recruited many new members"
To insert in a roil; to register or enter in a list or catalogue or on rolls of court; hence, to record; to insert in records; to leave in writing; as, to enroll men for service; to enroll a decree or a law; also, reflexively, to enlist