First class and Fly
Related terms
First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Fly
Fly adjective - (British informal) not to be deceived or hoodwinked.
First class and fly are semantically related. Sometimes you can use "First class" instead an adjective "Fly".
Cite this Source
Fly and First class. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/first_class/fly
First class & Fly. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/first_class/fly>.
Fly or First class. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/first_class/fly.
Google Ngram Viewer shows how "first class" and "fly" have occurred on timeline