What is the meaning of the word "share"?

Definitions:

any of the equal portions into which the capital stock of a corporation is divided and ownership of which is evidenced by a stock certificate noun
- My friends bought 100 shares of IBM at the market price.
assets belonging to or due to or contributed by an individual person or group noun
- They wanted their share in cash.
communicate verb
- I'd like to share this idea with you
have in common verb
- Our children share a love of music
have, give, or receive a share of verb
- We shared the cake
the allotment of some amount by dividing something noun
- death gets more than its share of attention from theologians