Noun mastery has 3 senses
  1. command, control, mastery - great skillfulness and knowledge of some subject or activity; "a good command of French"
    --1 is a kind of skillfulness
    Derived form: verb master1
  2. domination, mastery, supremacy - power to dominate or defeat; "mastery of the seas"
    --2 is a kind of dominance, ascendance, ascendence, ascendancy, ascendency, control
    --2 has particulars: transcendence, transcendency, superiority
    Derived form: verb master3
  3. mastery, subordination - the act of mastering or subordinating someone
    --3 is a kind of domination
    Derived form: verb master3