organize  
verb [ T ] (UK usually organise) uk/ˈɔː.ɡən.aɪz/ us/ˈɔːr.ɡən.aɪz/
  (ARRANGE)      
 B1 安排;组织;筹划
to make arrangements for something to happen
  They organized a meeting between the teachers and students. 他们组织了一次师生会议。 
 [ + to infinitive ] UK She had organized a car to meet me at the airport. 她已安排了一辆车来机场接我。 
 - More examples
 - She has been designated to organize the meeting.
 - Most British schools organize social events for the students.
 - She organizes a school reunion once a year.
 - This event was organized in association with the Sports Council.
 - She's an active member of the Women's Institute and is always organizing talks for her local group.
 
  (MAKE A SYSTEM)      
B2 (按某一体系)整理;安排
to do or arrange something according to a particular system
  The books were organized on the shelves according to their size. 书按大小摆放在书架上。 
informal My mother is always trying to organize me (= make me do things in the way she likes). 我母亲总是想要我按她喜欢的方式行事。 
 - More examples
 - She organizes her financial affairs very efficiently.
 - The secretary was busy organizing the files.
 - This new program will help you organize your files more efficiently.
 - He organized his bibliography into three sections.
 - She organized the language classes according to ability.
 
Idiom  
couldn't organize a piss-up in a breweryidiom UK offensive 小事也安排不好,连一点儿小事也办不了
said about someone who is completely unable to organize things