(education) A class, typically in a performing art such as music or drama, in which a teacher listens to and critiques the performance of individual students, one at a time, while the other students look on.

(US) A former class of mail consisting mostly of heavier printed matter.

Of or pertaining to a class action.

(US) A person in a school's student council who takes minutes at meetings etc.

A class of people in a society characterized by low incomes, low level of education, high unemployment and, as a result of these, a low social status.

A social and economic demographic, commonly identified as part of the upper middle class. / (in the plural) The groups in society composed of highly educated professionals.

(number theory) A coset of an ideal of the ring of integers.

(sometimes derogatory) Conflict between sociopolitical classes.

(object-oriented programming) A class from which other classes can be derived, inheriting its functionality or interface; a potential superclass for subclasses.

(object-oriented programming) A class that cannot be instantiated and may have abstract method.