<philosophical terminology> distinction between two ways of employing a word or phrase: in order to refer to something else (use) or in order to draw attention its own features (mention). "Sarah does well in chemistry" uses the name "Sarah". But:
"Sarah" is an anagram for "a rash",merely mentions it. Thus, the first proposition expresses a truth about my daughter, while the second merely points out an odd feature of her name.
[A Dictionary of Philosophical Terms and Names]
Try this search on OneLook / Google