First class
First class noun - Mail that includes letters and postcards and packages sealed against inspection.
Old
Old adjective - Being of advanced years and especially past middle age.
First class is an antonym for old.
Both terms in one sentence
- This goes especially for Negi, who looks as old as the students from his first class when he should be only sixteen.
Source: Fan Fic / Still Waters Series - Strictly speaking, you could use the abilities of your first class before matching it with the second... but then you wouldn't get any Experience Points for the situation where you used your old abilities.
Source: Class Change Level Reset
Cite this Source
Old and First class. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/first_class/old
First class & Old. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/first_class/old>.
Old or First class. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/first_class/old.
Google Ngram Viewer shows how "first class" and "old" have occurred on timeline