Definitions
1.NounThe highest belt colour in various martial arts.
2.NounSomeone who has attained the black belt in martial arts."Raymond is a black belt in karate."
3.NounGreat skill in any field.
4.NounA senior manager who is expert in one of various management systems such as Six Sigma or DMAIC and acts in a project leader or mentor role.
5.NounA geographic region where the residents are predominantly or exclusively African-American.
6.NounA roughly crescent-shaped geological formation of dark fertile soil in the Southern United States.