What does "connectedness" mean?

The state or quality of being connected.

What is a synonym for "connectedness"?

Common synonyms include: connection, accord, addition, adjunct, affairs, affiliation.

noun

noun ·Moderate ·College level

Noun

1
The state or quality of being connected. countable, uncountable
2
a relation between things or events (as in the case of one causing the other or sharing features with it) wordnet
3
the state of being connected wordnet

"Reinforce your inner sense of connectedness."

From connected + -ness.