Search Result for "1st-class mail":
Wordnet 3.0

NOUN (1)

1. mail that includes letters and postcards and packages sealed against inspection;
[syn: first class, 1st class, first-class mail, 1st-class mail]



WordNet (r) 3.0 (2006):

1st-class mail
    n 1: mail that includes letters and postcards and packages
         sealed against inspection [syn: first class, 1st class,
         first-class mail, 1st-class mail]