Definitions of 1st class
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mail that includes letters and postcards and packages sealed against inspection
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synonyms:
1st-class mail, first class, first-class mail
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types:
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correspondence
communication by the exchange of letters
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card
a rectangular piece of stiff paper used to send messages (may have printed greetings or pictures)
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type of:
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mail
the bags of letters and packages that are transported by the postal service
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correspondence
DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘1st class'.
Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors.
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