n.
Pronunciation: ˌ in(t)-str ə -m ə n- ' t ā -sh ə n, - ˌ men-
Function: noun
Date: 1845
1 : the arrangement or composition of music for instruments especially for a band or orchestra
2 : the use or application of instruments (as for observation, measurement, or control)
3 : instruments for a particular purpose also : a selection or arrangement of instruments