A genre is literally a categorization of a concept, usually within a medium like literature. It also has a marketing connotation in common usage, referring to market segments or specific consumer groups in an industry. The word 'genre' is used as a noun related to generic references, creating a conditional context for the subject noun. Genres are also the basis of categorization of sub genres within a medium, a conceptual lineage.
Examples of Genre:
Literary genres: Science fiction, romance, horror, crime, non fiction, humor|
Literary sub genres: Crime: murder mystery, white collar, street
TV genres: Comedy, drama, soap operas, documentaries, game shows, reality TV
TV sub genres: Comedy: family sitcom, suburban comedy, animation, cartoons.