Özet:

Turkish is a language which is included in the Ural-Altaic language family group. The main feature of this language family is that it has an agglutinative language system. Therefore, the words are declined and derived with affixes. This is considered as the most basic feature of this language family. It is seen that the affixes are sometimes used for declension and derivation of words in the Indo-European and Hami-Semitic languages families which are supposed in flexional languages. The affixes in languages whose the affixes are used for declension and derivation of words are divided into three groups as "prefix", "infix" and "suffix" by linguists. Therefore, according to this classification, Turkish is defined as a language that has suffix in the Ural-Altaic language family. This description is not wrong; but it is incomplete; because only the position of the affixes in the structure has been considered and their functions have been ignored in the classification. When the meaning relationship between word and affix is taken into account, different categories reveal. One of these categories is based on the fact that the affix affects the meaning of the word that takes itself, as an example in "Ali entered the class." sentence, -a affix of "class" word affects to the meaning of "class" word, which is a suffix according to this function. Secondly, the affix affects to the meaning of the word which follows itself, for intanse -den affix in "from yesterday" example affects the meaning of "make" word and -up affix in "stop" example affects the meaning of stop verbs, which could be called as "preliminary affix". Thirdly, the affix affects both the word that takes itself and the word that follows itself, for example -ip affix in "going" example affects both "going" verb and "going" verb, which could be called as "intermediate affix". Consequently, in this paper on the grounds that the definition of "Turkish is a language that has the suffixes. “Turkish is a language which has the suffixes according to the structure and has the latter, preliminary and intermediate affixes according to the function.” In order to describe the Turkish system correctly.