n.

1. 合作，協力[U]
   The success of the project relies on the cooperation of all involved parties.

   這個專案的成功依賴於所有相關部門的合作。

   The prime minister's visit further promoted the cooperation between the two countries.

   總理的訪問進一步促進了兩國間的合作。

2. 合作社[C]
3. 【生】協同作用，互助[U]

n.

1. the action or process of cooperating.
2. Economics  the formation and operation of cooperatives.