When it comes to decision-making, "authoritative decision" is a common phrase that we often hear. However, sometimes we need to twist the language a bit to convey the same message with a different tone. Some synonyms for authoritative decision include "definitive decision," "firm decision," "final say," "decisive conclusion," "settled judgement," and "unquestionable determination." Each of these phrases highlights the concept that a person or group has made a decision with no doubt or ambiguity involved. Using any of these synonyms can create a varied perspective and tone while still expressing the same message of a clear and confident decision.