first-class
adjectiveUK /ˌfɜːst ˈklɑːs/
US /ˌfɝːst ˈklæs/
The very best kind of something.
She got first-class tickets for the train.
RELATED WORDS
OTHER MEANINGS
2. The best and most expensive level of service, as on a train or plane.
They flew first-class to Paris.
3. A mark of the highest grade in a university degree in the UK.
He earned a first-class degree in history.
4. Belonging to the highest rank or category.
She is a first-class citizen in the new system.