fourth class

noun

Definition of fourth class

1 : a class or group ranking fourth in a series
2a : a class of mail in the U.S. that comprises merchandise and non-second-class printed matter weighing over 8 oz. and not sealed against inspection
b : a class of mail in Canada that comprises merchandise and printed matter exceeding certain weights

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Cite this Entry

“Fourth class.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fourth%20class. Accessed 29 Nov. 2020.

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