Note: in BRIT, also use 'civilised'
1.
If you describe a society as ~, you mean that it is advanced and has sensible laws and customs.
I believed that in ~ countries, torture had ended long ago.
ADJ approval
2.
If you describe a person or their behaviour as ~, you mean that they are polite and reasonable.
I wrote to my ex-wife. She was very civilised about it.
ADJ