inclusion

(noun) the state of being included.

(noun) the relation of comprising something. Synonyms: comprehension. Example: "He admired the inclusion of so many ideas in such a short work."

(noun) any small intracellular body found within another (characteristic of certain diseases). Synonyms: inclusion body, cellular inclusion. Example: "An inclusion in the cytoplasm of the cell."

(noun) the act of including.