What is the meaning of the word "connecting"?

Definitions:

Associate or relate in some respect. VERB
- Some kinds of batteries can be recharged by connecting them to a source of direct current.
Joining or being joined. ADJECTIVE
- There's a connecting walkway between the buildings.
To join or link two things together VERB
- Connecting a computer to a printer using a USB cable
- Connecting with friends on social media
- Physically connecting two pieces of furniture with screws and bolts
- Volunteering at the local community center has been a rewarding experience for me, as I connect with individuals from diverse backgrounds and help make a positive impact in their lives.