Class could mean:

• Social class refers to the differences between groups in societies or cultures, and is a basic idea in economics, sociology and other social sciences
• Class (education), a group of students in a course or lesson
  • class, a lesson, in education
  • class, short for a classroom

• Class (biology), a rank used in taxonomy
• Class (philosophy), distinguishes between classes and types
• Class (set theory), in mathematics
• Travel class