I. Introduction
Word-sense disambiguation means to determine the right meaning of a word which is ambiguous at the first sight and it seems to have several semantic classes. Generally, words with more than a single meaning can be set as target words and our aim is to disambiguate their sense. Humans can easily identify the right meaning of a word based on deduced concept from the sentence, but computer needs more information than only the input sentence in order to identify semantic class of an ambiguous word. By applying disambiguation methods it is possible to extract concepts of a sentence and give it to computer to decide about semantic class of ambiguous word. Word-sense disambiguation is highly taken into consideration in prevalent languages like English and lots of research has been carried out in order to disambiguate words in English language.