last word

noun

1. the closing remark or comment, as in an argument.

   By the rules of debate she would have the last word.

2. a final or definitive work, statement, etc..

   This report is the last word on the treatment of arthritis.

3. the latest, most modern thing.

   Casual hairdos are the last word this season.

Word History and Origins

Origin of last word¹

First recorded in 1880–85