1. Arrange systematically or methodically
   "She organises her closet by colour";
   - organize
    
2. Bring order and organization to
   "Can you help me organise my files?";
   - organize, coordinate
    
3. Plan and control how a complex undertaking is done
   "he organised the robbery";
   - mastermind, engineer, direct, organize, orchestrate
    
4. Arrange by systematic planning and united effort
   "organise a strike";
   - organize, prepare, devise, get up, machinate
    
5. Bring together into a structured whole; establish an organization
   "social groups organise everywhere";
   - form, organize
    
6. Form, join, or organize a labour union
   "The auto workers decided to organise";
   - unionize, unionise [Brit], organize

Derived forms: organises, organising, organised

Type of: arrange, care, create, deal, fall in, handle, initiate, join, make, manage, pioneer, plan, set up

Antonym: disorganise [Brit]

Encyclopedia: Organise