Synonyms of First-class Mail in English :
Antonyms of First-class Mail in English
Thesaurus of First-class Mail in English
First-class Mail
see definition of first-class mailSynonyms of first-class mail
1. (noun) mail that includes letters and postcards and packages sealed against inspection
Hyponyms of first-class mail
1. (noun) mail that includes letters and postcards and packages sealed against inspection
Hypernyms of first-class mail
1. (noun) mail that includes letters and postcards and packages sealed against inspection