in ‧ stru ‧ men ‧ ta ‧ tion /ˌɪnstrəmenˈteɪʃ ə n, ˌɪnstrʊmenˈteɪʃ ə n/ BrE AmE noun [uncountable]
1 . the way in which a piece of music is arranged to be played by several different instruments
2 . the set of instruments used to help in controlling a machine:
aircraft instrumentation