break·down 
(brākdoun′)
(brākdoun′)n.
1.
a. The act or process of failing to function or continue.
b. The condition resulting from this: a breakdown in communication.
2. Electricity The abrupt failure of an insulator or insulating medium to restrict the flow of current.
3. A typically sudden collapse in physical or mental health.
4. An analysis, an outline, or a summary consisting of itemized data or essentials.
5. Disintegration or decomposition into parts or elements.
6.
a. A noisy, energetic American country dance.
b. The music for this dance.
7. A popular dance originating in the early 1970s, performed to funk music.