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adjective
serving or acting as a means or aid
"instrumental in solving the crime"
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relating to or designed for or performed on musical instruments
"instrumental compositions"
"an instrumental ensemble"
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system
instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity
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band
instrumentalists not including string players
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hardware
instrumentalities (tools or implements) made of metal
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ironware
instrumentalities (tools or implements) made of metal