/mas"teuhr ship', mah"steuhr-/ , n.
1. the office, function, or authority of a master.
2. control; command: to have mastership over one's desires.
3. mastery, as of a subject.
4. expert skill or knowledge: He played with the mastership of a devoted musician.
[ 1375-1425; late ME; see MASTER, -SHIP ]