Sentence:  <WSD>Heteronymy</WSD> is a matter of more than two expressions. A typical example is the set of terms for the days of the week, the set of basic colour terms (for more on colour terms, see 10.4) or terms for kinds of animals, plants, vehicles, etc. 
Meaning of the word marked with <WSD> tags:  The unrelatedness of words for items that are related by being members of a single category.