Break down means:
1. to divide figures or data into component parts, analyse.
- We must break down the total expenses to know how much each person has to pay.
2. to stop working/functioning
- My car just broke down in the middle of the motorway.
3. start crying
- He broke down when her girlfriend left him.
- We must break down the total expenses to know how much each person has to pay.
2. to stop working/functioning
- My car just broke down in the middle of the motorway.
3. start crying
- He broke down when her girlfriend left him.