A section of a newspaper, magazine or web site containing classified advertisements.

Third-person singular simple present indicative form of classify

The state or condition of being classifiable.

(mathematics) A topological space that is the quotient of a free action (of the specified group) on a weakly contractible space.

plural of classifying space

(category theory) A morphism from an object to the subobject classifier which corresponds to a unique subobject of the said object, which subobject is the pullback, along this morphism, of the "true" global element of the subobject classifier.

plural of classifying morphism

plural of classified advertisement

Any of a list of newspaper or website advertisements included with others under a heading describing the category of product or service offered.

(informal) classified advertisement