n.

1. the thing arranged or agreed to;
   agreement
   
   • they made arrangements to meet in Chicago
2. an orderly grouping (of things or persons) considered as a unit; the result of arranging
   
   • a flower arrangement
3. an organized structure for arranging or classifying;
   organization, organisation, system
   
   • he changed the arrangement of the topics
   • the facts were familiar but it was in the organization of them that he was original
   • he tried to understand their system of classification
4. the spatial property of the way in which something is placed;
   placement
   
   • the arrangement of the furniture
   • the placement of the chairs
5. a piece of music that has been adapted for performance by a particular set of voices or instruments;
   musical arrangement
6. the act of arranging and adapting a piece of music;
   arranging, transcription