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nonmailable

adjective
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non·​mailable

Definition of nonmailable

1 : being in an unfit condition for mailing a hole in the paper as the result of poor erasing should render a paper nonmailable— Virginia Reva
2 : not lawful to mail had the right to declare particular issues of the paper nonmailable— O. K. Fraenkel

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“Nonmailable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nonmailable. Accessed 19 Jun. 2021.

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