noun [ U ]
1.
a way of travelling on a train or ship that costs less and is less comfortable than first class . In Britain this is now usually called standard class .
2.
(in Britain) the class of mail that costs less and takes longer to arrive than first class
3.
(in the US) the system of sending newspapers and magazines by mail
4.
[ U , sing. ] the second highest standard of degree given by a British university, often divided into upper second class and lower second class