Travel accommodations ranking below the highest or first class, as in Traveling second class on European trains is not only cheaper but gives you more contact with local people.
[ c. 1840
In the United States and Canada, a category of mail consisting of periodicals and newspapers.
[ c. 1870
second-class citizen. An individual regarded or treated as inferior to others in status or rights, an underprivileged person. For example, In many countries women still are considered second-class citizens. This term uses second class in the sense of “inferior.”
[ c. 1940