As soon as he went back to his table, my British colleague said "I love that word collegiality. It's really an American thing, isn't it?"
If it's not a word that you use much, then Wikipedia is helpful in this case:
Wikipedia also notes that in sociological terms, collegiality is the opposite of bureaucracy.
Colleagues are those explicitly united in a common purpose and respecting each other's abilities to work toward that purpose. A colleague is an associate in a profession or in a civil or ecclesiastical office.Thus, the word collegiality can connote respect for another's commitment to the common purpose and ability to work toward it.
The word comes from French, and certainly can be found in BrE texts. But in academic life, it certainly is true that it's a word one hears much more on the left side of the pond.