To Split

1. (transitive, ergative, of something solid) To divide fully or partly along a more or less straight line. Synonym: To Cleave
2. (intransitive, of something solid, particularly wood) To break along the grain fully or partly along a more or less straight line.
3. (transitive) To share; to divide.
4. (transitive, intransitive, slang) To leave.
5. (intransitive, of a couple) To separate. Synonyms: break up, split up
6. (ambitransitive) To (cause to) break up; to throw into discord.
7. (algebra, transitive and intransitive, acts on a polynomial) To factor into linear factors.
   1. (generally, of an algebraic structure) To be expressable as a direct sum of sub-modules, -algebras, etc.
   2. (of an object which expresses the relationship between algebraic structures, particularly a short exact sequence) To contain an object which may be so expressed.
8. To be broken; to be dashed to pieces.
9. (intransitive) To burst out laughing.
10. (intransitive, slang, dated) To divulge a secret; to betray confidence; to peach.
11. (sports, especially baseball) For both teams involved in a doubleheader to win one game each and lose another.
12. (intransitive, politics) To vote for candidates of opposite parties.