decider

/dษชหˆsaษชdษ™(ษน)/

IPA: /D IH0 S AY1 D ER0/

noun
  1. 1

    (of a controversy, question, etc) A person, divinity, or authoritative text which decides.

  2. 2

    An event or action which decides the outcome of a contested matter.

  3. 3

    A Turing machine that halts regardless of its input.

Source: https://en.wiktionary.org/wiki/decider