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fourth-class

[fawrth-klas, -klahs, fohrth-] /ˈfɔrθˈklæs, -ˈklɑs, ˈfoʊrθ-/
adjective
1.
of, relating to, or designated as a class next below third, as for mailing, shipping, etc.
adverb
2.
as fourth-class matter; by fourth-class mail:
Send it fourth-class.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for fourthclass

fourth-class

adjective
1.
of or relating to mail that is carried at the lowest rate
adverb
2.
by fourth-class mail
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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