(Marxism, social sciences) An individual's awareness of their relative place within the class system of society.

(agriculture) A commodity, usually produced on farms and part of a larger category. Products within a market class have similar physical characteristics, are grown or raised under similar conditions, and are bought and sold under similar terms and conditions.

(mathematics) An equivalence class of an equivalence relation that is a congruence.

(object-oriented programming) A nested inner class whose functions and member variables can be overridden and redefined by subclasses of an outer class. / (education) An online class.

In the best of its category.

(transitive, informal) To make more classy or sophisticated

A tuitional class held in the evening, typically for adults, and teaching a vocational or academic subject, practical skill, or recreational pursuit.

(computational complexity theory) a set of computational problems of related resource-based complexity

(object-oriented programming) A class that can be instantiated and may have concrete methods.

(crystallography) Any of 32 possible classes of crystals, arising from the 32 possible combinations of symmetry operations.