Lexical Ambiguities
Frequently there exists more than one lexical form associated with a surface form of a word. For example "house" may be a noun in the singular, /haʊs/, or may be a verb in the present tense, /haʊz/. As a result of this it is necessary to have a function which relates input strings with their corresponding output strings.
If we define the set of input words such that, the correspondence funcion would be defined as .
Read more about this topic: Morphological Dictionary