n.

1. 協會，公會，社團[C]
   Have you joined the teachers' association?

   你加入教師協會了嗎？

2. 聯盟[C]
3. 聯合，結合；交往[U][（+with）]
   I benefited much from my association with him.

   我從跟他的交往中獲益匪淺。

4. 聯想，聯想物[C][U]
   What association do you have with the color green?

   綠色會使你產生什麼聯想？

5. 夥伴關係[U]

n.

1. a group of people organized for a joint purpose.
2. a connection or cooperative link between people or organizations.
   ▸Chemistry  a weak interaction between molecules, such as hydrogen bonding.
3. a conceptual connection.
4. Ecology  a stable plant community including a characteristic group of dominant plant species.