WordWeb Online

1. An artifact (that is instrumental in accomplishing some end) for accomplishing some end
   - instrumentality, means
    
2. The act of providing or using the instruments needed for some implementation
    
3. The instruments called for in a musical score or arrangement for a band or orchestra
    
4. The act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments
   - orchestration

Derived forms: instrumentations

Type of: arrangement, arranging, artefact [Brit], artifact [N. Amer], effectuation, implementation, musical arrangement, transcription

Encyclopedia: Instrumentation, Systems, and Automation Society