1.a group of people who work together
2.an organized structure for arranging or classifying;
he changed the arrangement of the topics
3.the persons (or committees or departments etc.) who make up a body for the purpose of administering something;
he claims that the present administration is corrupt
4.the act of forming something;
the constitution of a PTA group last year
5.the act of organizing a business or business-related activity;
he was brought in to supervise the organization of a new department
6.the activity or result of distributing or disposing persons or things properly or methodically;
his organization of the work force was very efficient
7.an ordered manner; orderliness by virtue of being methodical and well organized;
his compulsive organization was not an endearing quality