transitive verb organized -·ized′, organizing -·iz′·ing

1. to provide with an organic structure; esp.,
   1. to arrange in an orderly way to organize files
   2. to make into a whole with unified and coherent relationships to organize an essay
   3. to make plans or arrange for to organize a campaign
2. to bring into being; establish to organize a corporation
3. to persuade to join in some common cause or some organization; specif.,
   1. to enlist in, or cause to form, a labor union
   2. ☆ to enlist the employees of (an industry, business, etc.) in a labor union
4. Informal to set (oneself) into an orderly state of mind

Etymology: ME organyzen < ML organizare < L organum: see organ

intransitive verb

1. to become organized
2. ☆ to join in some common cause or form some organization, esp. a labor union