Dictionary & Thesaurus

first class

1.	(noun) the most expensive accommodations on a ship or train or plane
	Related Words: accommodation

2.	(noun) the highest rank in a classification
	Related Words: high quality, superiority

3.	(noun) mail that includes letters and postcards and packages sealed against inspection
	Synonyms: 1st class, 1st-class mail, first-class mail, priority mail
	Related Words: correspondence, mail