association; fellowship
change (of season, year, etc.)
「交」 has another reading with different meanings.
alternately; in succession
国交を正式に結んだ国もあります。
There are also countries that established diplomatic relations.
社交的な性格が好まれる。
A sociable personality is favored.
親交のある友人と食事をした。
I had dinner with a close friend.