The act of enrolling or the state of being enrolled.
The number of people enrolled.
The record of such enrolling; registration.
The people enrolled, considered as a group.
The act of signing up or registering for something.
The art of selecting and combining the stops or registers of an organ.
That which registers or makes something official, e.g. the form or paper that registers.
Alignment, e.g. of colors or other elements in a printing process.
The location where guests register, especially with a hotel.