n.

1. 結盟；聯盟，同盟；聯姻[C][U][（+with/between）]
   They tried to forge an alliance.

   他們試圖建立同盟。

2. 結盟諸國；聯姻各方[C][G]
3. 類同，相似；親緣關係[U][C][（+between）]

n.

1. a union or association formed for mutual benefit.
   ▸a relationship based on an affinity.
   ▸the state of being joined or associated.
2. Ecology  a group of closely related plant associations.