EN
The paper presents the current state of studies on comparative phraseological units in Polish and Serbian linguistics. The position of these components in phraseology and in modern Polish and Serbian is discussed in detail. This article presents a semantic and functional classification of comparisons phraseological units, dividing them into idiomatic and ‘phrasematic’ comparisons. In the Polish and Serbian sentence these units may act as a verb, noun, adverb or adjective. The paper also discusses a major derivational processes in which comparisons play a role of a linguistic motivating base. Within this kind of derivation we can speak about two main linguistic models: PHRASEOLOGICAL UNIT > WORD and PHRASEOLOGICAL UNIT > PHRASEOLOGICAL UNIT. In these processes transposition, disintegration and univerbisation are used as methods of formation of the new lexicon’s elements. Comparisons have a specific property too — the matter is a ‘polisemantization.’ It means that comparisons can expand the semantic field of the word which makes some phraseological unit.