What does "nonpartisanship" mean?

The quality of not being partisan, of remaining politically independent

What is a synonym for "nonpartisanship"?

Common synonyms include: impartiality.

noun

noun ·Rare ·Advanced level

Noun

1
The quality of not being partisan, of remaining politically independent uncountable
"The incident was about an organization's preserving its reputation for nonpartisanship, not curbing the free speech of its employees."
2
an inclination to weigh both views or opinions equally wordnet

"The incident was about an organization's preserving its reputation for nonpartisanship, not curbing the free speech of its employees."

From nonpartisan + -ship.