Definition of the last/final word
1
:the final thing said in an argument or a discussion
- Your mother's decision is the final word on the matter.
- Why do you always have to have the last word?
2
:the power to make a final decision
- The judge will have the last word on the divorce agreement.
3
informal
:the most modern or best one of its kind
- This is the last word in wireless phones.
- The van's design is the last word in safety.
