/fawrth"klas", -klahs", fohrth"-/ , adj.
1. of, pertaining to, or designated as a class next below third, as for mailing, shipping, etc.
adv.
2. as fourth-class matter; by fourth-class mail: Send it fourth-class.
/fawrth"klas", -klahs", fohrth"-/ , adj.
1. of, pertaining to, or designated as a class next below third, as for mailing, shipping, etc.
adv.
2. as fourth-class matter; by fourth-class mail: Send it fourth-class.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012