From The Martial Arts Encyclopedia

A style of combat/martial arts training that involves training in multiple styles of fighting to include all ranges of combat. The ranges of combat are defined as stand-up, clinch and grappling. Stand-up styles include muay thai, boxing, kickboxing and karate. Styles that emphasize clinching include greo-roman wrestling and muay thai. Grappling styles include judo, sambo, brazilian jiu-jitsu, freestyle wrestling, catch wrestling and shoot wrestling.