the last word in something

the last word in (something)

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. They claim to be designing the last word in drone technology.
See also: last, word
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

the last word in something

If you say that something is the last word in luxury, comfort, or some other quality, you mean that it has a great deal of this quality. The spa is the last word in luxury and efficiency.
See also: last, something, word
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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