Semantic features. The adjective expresses the property of an entity. Typically, adjectives denote states, usually permanent states, although there are also adjectives which can denote temporary states. Adjectives are characteristically stative, but many of them can be seen as dynamic.
Morphological features. Derivationally, adjectives are related either to nouns or verbs.
Syntactic features. In the sentence, the adjective performs the functions of an attribute (an adjunct) and a predicative. Of the two, the more typical function is that of an attribute since the function of a predicative can also be performed by other parts of speech.