1. interval; period of time
今日から三日間が勝負です。The next three days are the decisive period.
2. among; between; inter-
少し前から両グループ間には不穏な空気が漂っていた。For some time, there had been an uneasy atmosphere between the two groups.
3. good opportunity; chance
4. estrangement; discord; alienation
5. spy; secret agent