This definition appears very rarely
However, it is in fact an outdated work. It was produced in the 1800s, and much has been learned about the Greek of the NT since that time. Thayer's still has some value. And I did refer to it some as I was working on my Analytical-Literal Translation of the New Testament: Third Edition (ALT). However, much more often, I referred to newer lexicons like Analytical Lexicon of the Greek New Testament.