third class noun
1 [noncount] a : the level of service on a train, ship, etc., that is the cheapest
▪ seats in third class
b : a class of mail in the U.S. that includes advertisements 2 [singular] Brit : an undergraduate degree of the lowest level given by a British university
▪ She got a third class in English.
▪ seats in third class
b : a class of mail in the U.S. that includes advertisements
▪ She got a third class in English.
