This article intends to prove that Persian Classical Ghazal has a complex structure. To do this, at first a definition will be given of the complex structure and then it will be shown that the components of Ghazal can be divided into two groups of “linguistic constituents” and “musical constituents”. Recursion, reference, collocation, synonymy, antonymy, substitution, hyponymy belong to the former, and rhythm, rhyme, identical rhyme, alliteration, trace, crossed rhyme, and analogue belong to the latter. The interaction among these constituents gives existence to a network of relations that will lead to an internal system which we call “complex structure”. This can be, among all, the reason for the existence of paradigmatic interactions in ghazal.
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