What is the meaning of the word "bond"?

Definitions:

a certificate of debt, usually interest-bearing or discounted, that is issued by a government or corporation in order to raise money noun
- Our advisor felt that bonds were a safe investment.
the property of sticking together, as of glue and wood, or the joining of surfaces of different composition noun
- We should bond these pieces together.
to bring together in a common cause or emotion verb
- We bonded over our love of football.
to create social or emotional ties verb
- The grandparents want to bond with the child.
to issue bonds on verb
- Some new investors bonded the city's municipal fund.
to stick to firmly verb
- I bond the two parts together with glue.