A category or rank that is considered inferior to the first or highest class, often used in reference to accommodations, services, or social status. Passengers with second-class tickets boarded the train after those in first class.
A postage rate for sending items that are not urgent, typically slower and less expensive than first-class mail. She sent the package by second-class to save on shipping costs.
A person who is regarded as belonging to an inferior or subordinate group within a society or organization. He felt like a second-class citizen because of the discriminatory laws.