D defs.my
Entry 6 senses Webster, 1913

Mastery

/măs'-tẽr-ē/ · Mas·ter·y · IPA /ˈmæs.tɚ.i/
01 n. The position or authority of a master; dominion; command; supremacy; superiority.
pl. Masteries ((#))
  1. 1.
    The position or authority of a master; dominion; command; supremacy; superiority.
    “If divided by mountains, they will fight for the mastery of the passages of the tops.” Sir W. Raleigh.
  2. 2.
    Superiority in war or competition; victory; triumph; preeminence.
    “The voice of them that shout for mastery.” — Ex. xxxii. 18.
    “Every man that striveth for the mastery is temperate in all things.” — 1 Cor. ix. 25.
    “O, but to have gulled him Had been a mastery.” B. Jonson.
  3. 3.
    Contest for superiority.[Obs.]
  4. 4.
    A masterly operation; a feat.[Obs.]
    “I will do a maistrie ere I go.” Chaucer.
  5. 5.
    the philosopher's stone.[Obs.]
  6. 6.
    The act process of mastering; the state of having mastered.
    “He could attain to a mastery in all languages.” Tillotson.
    “The learning and mastery of a tongue, being unpleasant in itself, should not be cumbered with other difficulties.” Locke.