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first class, 1st class, first-class mail, 1st-class mail | mail that includes letters and postcards and packages sealed against inspection | |
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first class | the most expensive accommodations on a ship or train or plane | |
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first class | by first class conveyance; with first class accommodations | |
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excellent, first-class, splendid, fantabulous | very good; of the highest quality | |
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first class | the highest rank in a classification |