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1. An increase in the number of outstanding shares of a corporation without changing the shareholders' equity
   "they announced a two-for-one split up of the common stock";
   - split, stock split

1. Get a divorce; formally terminate a marriage
   "The couple split up after only 6 months";
   - divorce
    
2. Separate into parts or portions
   "split up the cake into three equal parts";
   - divide, split, separate, dissever, carve up
    
3. Discontinue an association or relation; go different ways
   "My friend and I split up";
   - separate, part, split, break, break up
    
4. Become separated into pieces or fragments
   "The figurine split up";
   - break, separate, fall apart, come apart

Derived forms: split up, splits up, splitting up

See also: break up, fall

Type of: change integrity, increase, step-up