1.Definition: an artifact (or system of artifacts) that is instrumental in accomplishing some end

Related Noun(s):instrumentality

Category: Objects

2.Definition: the act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments

Related Noun(s):orchestration

Category: General

3.Definition: the act of providing or using the instruments needed for some implementation

Category: General

4.Definition: the instruments called for in a musical score or arrangement for a band or orchestra

Category: General