There is also a relation of inverse variation between extension connections of terms. From the point of extension a higher class (genus) includes a lower (species). But from the point of view of connotation the lower class (species) includes to connotation of the higher class (genus).
Class terms or general terms, such as 'man', 'dog', 'river' etc., have two different kinds of meaning - they apply to things and signify some properties. The things to which a term applies constitute its denotation and the common and essential properties signified by the term constitute its connotation.
Connotation and denotation are closely interrelated. The following points should be noted with regard to their relation.