1 [usuallybeforenoun] in the best group; of the highest standard
SYNEXCELLENT:
a first-class novel * a first-class writer * The car was in first-class condition. * I know a place where the food is first-class.
2 [onlybeforenoun] connected with the best and most expensive way of travelling on a train, ship, etc:
first-class rail travel * a first-class cabin / seat / ticket
3 [onlybeforenoun] (in Britain) connected with letters, parcels/packages, etc. that are delivered most quickly, or that cost more to send:
first-class mail / post / postage / stamps
4 [onlybeforenoun] used to describe a university degree of the highest class from a British university:
She was awarded a first-class degree in English.
