To acquire, or attempt to acquire knowledge or an ability to do something.
To attend a course or other educational activity.
To teach.
To come to know; to become informed of; to find out.
To gain knowledge from a bad experience so as to improve.
To study.
The act of learning something
To keep in possession or use.
To employ by paying a retainer.
To hold back (a pupil) instead of allowing them to advance to the next class or year.
To keep in one's pay or service.
To hold secure.