First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Smart and first class are semantically related. in excellent topic. In some cases you can use "Smart" instead an adjective phrase "First class", when it comes to topics like stylish.
Smart
Smart adjective - Being strikingly neat and trim in style or appearance.
First class and smart are semantically related. Sometimes you can use "First class" instead an adjective "Smart".
Both terms in one sentence
- TV Buffy, especially in the first few episodes was whip smart, extremely perceptive, a better researcher than Giles and explicitly singled out as having a first class mind by one of her teachers.
Source: Adaptational Intelligence
Cite this Source
Smart and First class. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/first_class/smart
First class & Smart. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/first_class/smart>.
Smart or First class. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/first_class/smart.
Google Ngram Viewer shows how "first class" and "smart" have occurred on timeline