What is the meaning of fall out?

verb

• Have a breach in relations.
  • usage: "We fell out over a trivial question"
• Come as a logical consequence; follow logically.
  • usage: "It follows that your assertion is false"; "the theorem falls out nicely"
  • synonyms: follow
• Come off.
  • usage: "His hair and teeth fell out"
  • synonyms: come out
• Leave (a barracks) in order to take a place in a military formation, or leave a military formation.
  • usage: "the soldiers fell out"
• Come to pass.
  • usage: "What is happening"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important"
  • synonyms: happen, hap, go on, pass off, occur, pass, come about, take place