What is the meaning of break down?

verb

• Make ineffective.
  • usage: "Martin Luther King tried to break down racial discrimination"
  • synonyms: crush
• Make a mathematical, chemical, or grammatical analysis of; break down into components or essential features.
  • usage: "analyze a specimen"; "analyze a sentence"; "analyze a chemical compound"
  • synonyms: analyze, analyse, dissect, take apart
• Lose control of one's emotions.
  • usage: "When she heard that she had not passed the exam, she lost it completely"; "When her baby died, she snapped"
  • synonyms: lose it, snap
• Stop operating or functioning.
  • usage: "The engine finally went"; "The car died on the road"; "The bus we travelled in broke down on the way to town"; "The coffee maker broke"; "The engine failed on the way to town"; "her eyesight went after the accident"
  • synonyms: fail, go bad, give way, die, give out, conk out, go, break
• Fall apart.
  • usage: "the building crumbled after the explosion"; "Negotiations broke down"
  • synonyms: crumble, crumple, tumble, collapse
• Cause to fall or collapse.
• Separate (substances) into constituent elements or parts.
  • synonyms: decompose, break up
• Collapse due to fatigue, an illness, or a sudden attack.
  • synonyms: collapse