An Apprentice is a student in a formal relationship with a member of the Order of the Laurel. The terms of this relationship is entirely dependent on both the Laurel and the Apprentice.
From the 13th century an apprentice was a youth who was undergoing training in a trade and had not yet completed his training. As a result he would not as yet have been acccepted into a guild as a journeyman.
Typically an apprentice would live in the home of his master for between two to seven years and would have secured the position by his parents paying the master to take him on. He was usually not allowed to marry.
Note that usage of terms like “apprentice,” “journeyman,” and “master” (and, indeed, “guild”) varied widely depending on time and location.
Apprentices are marked by the wearing of a green belt.