What is the meaning of the word "split"?

Definitions:

(especially of wood) cut or ripped longitudinally with the grain adjective
- we bought split logs for the fireplace
a divided formation of pins left standing after the first bowl in ten-pin bowling noun
- I was winning until I got a split in the tenth frame.
a lengthwise crack in wood noun
- I inserted the wedge into a split in the log.
a promised or claimed share of loot or money noun
- I demanded my split before they disbanded.
an increase in the number of outstanding shares of a corporation without changing the shareholders' equity noun
- they announced a twoforone split of the common stock