In this research we have included all open issues regarding adjectives on all linguistic levels, and have examined the usage of definite and indefinite adjectives in the functional styles of normativistics. The issues were allocation of adjectvies, their relation to numerical words, writing of possessive adjectives, paronymy, incomplete analysis of ambiguity and overusage of adjectives. Standard norm and usage diverge in the spoken language regarding adjective compound's stress because of their inconsistent behaviour. In normative manuals non-inflective adjectives are insufficiently and flighty analyzed, whereas in literature problematic and multigender words are in attributive and predicative condition. Also, little is said about the order of premodification adjectives. While researching the usage of definite and indefinite adjectives in scientific, administrative and publicist styles, we have concluded that the most mistakes are being made with the inflection of possessive adjectives that end in -ov, -ev and -in, and the least in the scientific style (except the texts from non-linguistic areas), while some more in the administrative and publicist style. Vowel extensions, as a characteristic of a more selective style, are more common in scientific, serious analytical and the most important legislative texts.