What does "mutually" mean?

In the same way, each to the other; reciprocally.

What is a synonym for "mutually"?

Common synonyms include: reciprocally, all at once, all together, as one, at once, au pair.

Pronounced //ˈmjut͡ʃuəli//.

/ˈmjut͡ʃuəli/ adv

adv ·Uncommon ·Advanced level

Adverb

1
In the same way, each to the other; reciprocally.
"The contract was mutually binding."
2
In a shared manner; equally; affecting all parties the same way.
"The adventure was mutually beneficial."

Adverb

"These facts are mutually related."

From mutual + -ly.