organization  
noun (UK usually organisation) uk/ˌɔː.ɡən.aɪˈzeɪ.ʃən/ us/ˌɔːr.ɡən.əˈzeɪ.ʃən/
  (GROUP)      
 B1 [ C ]组织,机构 
a group of people who work together in an organized way for a shared purpose
  the World Health Organization 世界卫生组织 
 The article was about the international aid organizations. 这篇文章是关于国际援助组织的。 
 - More examples
 - The company has evolved over the years into a multi-million dollar organization.
 - Because the organization is a charitable enterprise it is free from tax worldwide.
 - We've applied to a charitable organization for a grant for the project.
 - It's an organization that offers free legal advice to people on low incomes.
 - The hospital has asked various voluntary organizations to help raise money for the new operating theatre.
 
  (ARRANGEMENT)      
 B1 [ U ]组织,筹划(活动等) 
the planning of an activity or event
  He didn't want to be involved in the organization of/for the conference, although he was willing to attend and speak. 他不想参与大会的组织筹备工作,不过他愿意出席会议并发言。 
 - More examples
 - She's performed remarkable feats of organization for the office.
 - I blame poor organization, more than lack of funds, for the failure of the project.
 
  (SYSTEM)     
C1 [ U ]安排,配置 
the way in which something is done or arranged