1
to come together;to merge;to unite;to meet
このチョッキは前が合わない。
This waistcoat won't meet at the front.
2
to fit;to match;to suit;to agree with;to be correct
この白いコートはあなたによく合うでしょう。
This white coat will look very nice on you.
3
to be profitable;to be equitable
4
to do ... to each other;to do ... together
after the -masu stem of a verb
２人の女性はお互い微笑みあった。
The two ladies smiled at each other.