master
noun/ˈmæstər/ 
of servants
1 (old-fashioned) a man who has people working for him, often as servants in his homeThey lived in fear of their master.person in control
2 master of something a person who is able to control somethingShe was no longer master of her own future.skilled person
3 master (of something) a person who is skilled at somethinga master of disguisea master of the serve-and-volley game see also past masterdog owner
4 the owner of a dogThe dog saved its master's life.university degree
5 master's (also master's degree) a second university degree, such as an M.A. or an M.S.He has a Master's in Business Administration. see also M.A., M.B.A., M.S.6 usually Master a person who has a master's degreea Master of Arts/Sciencecaptain of ship
7 the captain of a ship that transports goodsfamous painter
8 a famous painter who lived in the pastan exhibition of work by the French master Monet see also old masteroriginal CD/movie
9 (often used as an adjective) a version of a CD, movie, etc. from which copies are madethe master copytitle
10 Master (old-fashioned) a title used when speaking to or about a boy who is too young to be called Mr. (also used in front of the name on an envelope, etc.)11 Master a title used for speaking to or about some religious teachers or leadersbe your own master
to be free to make your own decisions rather than being told what to do by someone else
be your own master