1st-class

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  1st-class \1st-class\ n.
     1. a class mail comprising letters, postcards, and other mail
        sealed against inspection, having a higher priority than
        second, third, or fourth-class mail; -- it is the highest
        class of mail not handled in a special manner, as is
        registered or priority mail.


  
     Syn: first-class, first-class mail, 1st-class mail
          [WordNet 1.5]