This probably makes no sense

In chapter 6, Lynch describes how certain things (like the color yellow) can't be defined any further. My question is this: Is it possible that the word "truth" is in the same category as yellow. By that I mean, are we trying to hard to define something that really can't be defined any further?

Also, have we as a class come up with the definition of truth that Lynch has been using? Did I miss that?