A tree diagram used to represent the various stages of a decision-making process, typically with each node representing a decision or question and each branch representing a possible consequence or answer resulting from the previous node.
Origin
1950s.
Definition of decision tree in US English:
decision tree
noun
A tree diagram used to represent the various stages of a decision-making process, typically with each node representing a decision or question and each branch representing a possible consequence or answer resulting from the previous node.