thirdclass
adjectiveUK /ˌθɜːd ˈklɑːs/
US /ˌθɝːd ˈklæs/
Third class means the lowest and cheapest level of something, like a seat on a train.
We bought third class tickets because they were much cheaper than first class.
RELATED WORDS
OTHER MEANINGS
2. The lowest rank or grade in a group or system.
He was placed in the third class of his year at school.
3. A section of mail that is slower and cheaper than first class.
The package was sent by third class mail and took a week to arrive.
4. Not very good in quality; of poor standard.
The hotel was third class, with small rooms and no hot water.