the last word in (something)

the last word in (something)

The most modern or advanced version of something. Yes, our building is undergoing renovations at the moment, but we have all the latest technology. I can assure you that this machine here is the last word in brain scans.
See also: last, word

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