third-class

Từ điển Oxford Advanced Learner 8th

ˈthird-class [third class third-class] BrE NAmE adjective
1. (especially in the past) connected with the cheapest and least comfortable way of travelling on a train, ship, etc.
2. (in the US) connected with the class of mail used to send advertisements, etc.
3. only before noun used to describe the lowest standard of degree given by a British university
4. (disapproving) (of people)less important than other people
•They are treated as third-class citizens.
Derived Word: ↑third class