first class
noun
1 first class
The highest rank in a classification.
2 first class
Mail that includes letters and postcards and packages sealed against inspection.
synonyms: 1st-class mail, 1st class, first-class mail.
3 first class
The most expensive accommodations on a ship or train or plane.
adverb
1 first class
By first class conveyance; with first class accommodations.
Moby thesaurus: best, first-chop, first-rate, greatest, highest, maximal, maximum, most, superlative, supreme, tip-top, top, top-drawer, top-hole, top-notch, topflight, topmost, topping, tops, uppermost ... show more.
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