D defs.my
Entry 1 sense Webster, 1913

Ascendency

/əs-ĕn'-dən-sē/ · As·cend·en·cy · IPA /əsˈɛndənsiː/
01 n. Governing or controlling influence; the state that exists when one person or group has power over another; domination; power.
  1. 1.
    Governing or controlling influence; the state that exists when one person or group has power over another; domination; power.
    “An undisputed ascendency.” Macaulay.
    “Custom has an ascendency over the understanding.” — Watts.