What is the meaning of the word "bail"?

Definitions:

(criminal law) money that must be forfeited by the bondsman if an accused person fails to appear in court for trial noun
- the judge set bail at $10,000
the legal system that allows an accused person to be temporarily released from custody usually on condition that a sum of money guarantees their appearance at trial noun
- They let you out on bail.
to deliver something in trust to somebody for a special purpose and for a limited period verb
- We bailed some goods.
to empty of water, typically with a bucket verb
- We need to bail out this canoe before we sink.
to release after a security has been paid verb
- We bailed out our troubled sibling.
to remove water from a vessel with a container verb
- We bailed frantically to prevent the rowboat from sinking.
to secure the release of someone by providing security verb
- I bailed them out after I got a call from the county jail.