klɑ s/ adj 1. very goodquality  You can get a first-class meal inthat hotel. 2. using the most expensive seatson a plane or train  Can I have a first-classreturn to Paris, please? 3. sent using themost expensive and quickest mail service A first-class letter should arrive the next day.(NOTE: as an adjective, usually writtenfirst-class)

Belonging to, or concerning, an individual person, company, or interest; peculiar to one's self; unconnected with others; personal; one's own; not public; not general; separate, Not publicly known; not open; secret, Not appropriate for use or display in public; intimate, noun_ A noncommissioned rank in the US Army or Marine Corps that is below private first class, A common soldier; one of the rank and file of an army, A secret message; private intimation