Definition of: breakdown

(brāk′doun′) noun
1. The act of breaking down; a collapse, as of a machine, one's health, etc.
2. A shuffling, stamping dance.
3. Chem. Decomposition or analysis of compounds.
4. The arrangement of large groups, as of facts, figures, operations, and processes, into categories permitting more efficient interpretation or management. Also break′-down′.