- 1st class as a noun:
- 1
1st class
noun
1 1st class
Mail that includes letters and postcards and packages sealed against inspection.
synonyms: 1st-class mail, first-class mail, first class.
debug info: 0.0147
noun
Mail that includes letters and postcards and packages sealed against inspection.
synonyms: 1st-class mail, first-class mail, first class.
debug info: 0.0147