first class

first class
1 [uncountable]TTDLT the best and most expensive seats on a plane or train, or rooms in a hotel:
We prefer to travel in first class.
business class, cabin class, economy class, tourist class
2 [uncountable]
a) TCM a class of post used in Britain for letters and parcels, that is quicker and more expensive than second-class post [↪ second class]
b) TCM the class of post used in the US for ordinary business and personal letters
3 [countable]SEC the highest class of degree from a British university

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