A semantic feature is a component of the concept associated with a lexical item ('female' + 'performer' = 'actress'). More generally, it can also be a component of the concept associated with any grammatical unit, whether composed or not ('female' + 'performer' = 'the female performer' or 'the actress'). An individual semantic feature constitutes one component of a word's intention, which is the inherent sense or concept evoked. Linguistic meaning of a word is proposed to arise from contrasts and significant differences with other words. Semantic features enable linguistics to explain how words that share certain features may be members of the same semantic domain. Correspondingly, the contrast in meanings of words is explained by diverging semantic features. For example, father and son share the common components of "human", "kinship", "male" and are thus part of a semantic domain of male family relations. They differ in terms of "generation" and "adulthood", which is what gives each its individual meaning.