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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.
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Merriam-Webster unabridgedWords at Play
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