■ noun
1》 a group of people or things considered together as the third best.
2》 Brit. the third-highest division in the results of the examinations for a university degree.
3》 US a cheap class of mail for unsealed printed material.
4》 chiefly historical the cheapest and least comfortable accommodation in a train or ship.
■ adjective & adverb of the third-best quality or in the ~.