This is only true in cases where the terms haven't been well-defined. The fact is, things such as "beautiful" and "love" ARE becoming well-defined as technology improves because we can extract coherent definitions from the environment even though people have a hard time describing them. The results have been very good. Mathematics has long held that it was possible to derive process definition in theory, even if people can't describe the process, based on the results. Now that fact and capability is catching up with the theory, this is turning out to be as true as many theorists believed. I find it intriguing that computers are able to create real and useful definitions for things that humans have poor facilities for expressing.
Technology does not define anything. People define things, technology implements these definitions. Human thought has been unable to define or prove concepts like "love" without using similarly scientifically vague terms like "affection," "appreciation," etc..