What is the meaning of split up?

noun

• An increase in the number of outstanding shares of a corporation without changing the shareholders' equity.
  • usage: "they announced a two-for-one split of the common stock"
  • synonyms: split, stock split

verb

• Get a divorce; formally terminate a marriage.
  • usage: "The couple divorced after only 6 months"
  • synonyms: divorce
• Separate into parts or portions.
  • usage: "divide the cake into three equal parts"; "The British carved up the Ottoman Empire after World War I"
  • synonyms: divide, split, separate, dissever, carve up
• Discontinue an association or relation; go different ways.
  • usage: "The business partners broke over a tax question"; "The couple separated after 25 years of marriage"; "My friend and I split up"
  • synonyms: separate, part, split, break, break up
• Become separated into pieces or fragments.
  • usage: "The figurine broke"; "The freshly baked loaf fell apart"
  • synonyms: break, separate, fall apart, come apart