- of the class, rank, excellence, etc. next below the highest; of secondary quality
- designating or of accommodations next below the best: a second-class railway carriage
- designating or of a former class of mail consisting of newspapers, periodicals, etc.
- inferior, inadequate, etc.
- lacking or denied full rights, privileges, etc.: a second-class citizen
- with accommodations next below the best: to travel second-class
- as or by second-class mail
- The group ranking next below the first, highest, or best group in a system of classification.
- Travel accommodations ranking next below the highest or first class.
- Of secondary status: second-class issues.
- Of or relating to travel accommodations ranking next below the highest or first class.
- Considered or treated as inferior in status, rights, or privileges in comparison with some others: second-class citizens.
- sec′ond class′
- Inferior in quality or standing.
- He complained he felt like a second-class citizen, but everyone felt put upon that day.
- Using second-class parts for the repair was false economy because they soon broke and had to be fixed again.
- We shipped the package second-class postage, which was better than travelling second-class on a plane.