1 of the best quality: a first-class hotel.
az: birincidərəcəli, yüksək səviyyəli
ru: первоклассный
2 very good: This food is first-class!
az: əsrarəngiz, mükəmməl
ru: превосходный
3 (for) travelling in the best and most expensive part of the train, plane, ship etc: a first-class passenger ticket; (also adverb)She always travels first-class.
az: birinci dərəcəli
ru: первого класса