Emmmm?... dificult to explain actually...
It means the "type, kind or sort" of something... generally the term is applied to literature, art, film and music.
So like in my previous post here my band names were geared around the rock genre...
Other music genres include pop, punk, ska, classical, jazz, blues... etc
Literature genres include romance, horror, thriller, etc..
Use the word three times and its yours!!!!
CB xx