What does "common ground" mean?

A characteristic or interest shared by multiple people or systems; any belief, etc. held in common.

Common ground

Common synonyms include: accord, agreement, compromise, consensus, informal understanding, middle ground.

noun

noun ·Rare ·Advanced level

Noun

1
A characteristic or interest shared by multiple people or systems; any belief, etc. held in common. idiomatic, uncountable
"The first thing to do is to find common ground with the person you just met."
2
a basis agreed to by all parties for reaching a mutual understanding wordnet

"The first thing to do is to find common ground with the person you just met."