be the last word inbe the last word in (something)
to be the best or most modern example of something.
It's a nice enough restaurant and it's very reasonably priced but it's not exactly the last word in style.
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be the last word in (something)
To be the most modern or advanced version of something. It may not look like much, but I can assure you that this machine is the last word in neural imaging.
be the last word
be the most fashionable or up-to-date.
1989Life Thanks to a built-in microchip, Teddy Ruxpin became the last word in talking dolls.