The case of definition or description.
The Genitive of Description
This use is closest to the root idea of the case. The genitive limits a noun much like an adjective. It falls under this classification when it does not fit any other. This use is also referred to as “the Attributive Genitive” or “the Qualitative Genitive.” It emphasizes kind.
The Genitive of Possession
The Genitive frequently defines, describes, and limits by denoting ownership.
The Genitive of Relationship
The Genitive may describe a person having some genital or marital relationship with another person. This relationship may extend to a household. In this usage the noun is omitted because it is clear from the context or it is well known to the recipients. The definite article usually occurs in the proper gender along with the Genitive of the person related.
The Adverbial Genitive
The Adverbial Genitive is used to describe, define, and limit as to kind of – time, place, general reference, and measure. The emphasis is this kind and not that kind.
Genitive of Time
Kind of time is defined. It may answer the question “what kind of time?” it is this kind of time in which something takes place, it is this time and not that time.
Genitive of Place
The kind of place is defined. The idea of contact is prominent. It may answer the question “what kind of place?” The emphasis is on kind, i.e. the kind of place within which an event takes place. It is “here and not there.” It limits to a kind of place. This use does not occur frequently in the N.T., since place is usually described by the Locative.
Genitive of Reference