Smart Definition
Etymology
Pronunciation
decisor
decision-maker
decis-
decision
+
-or
person who does something
Decisor means decision-maker and can be thought of as decis-0 (decision0) + -or1 (person who does something1).
noun
  1. decision-maker
    A person who makes decisions or has the power to decide.
    El gerente es el principal decisor en la empresa. // The manager is the main decision-maker in the company.