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Instrument Definition & Meaning - Merriam-Webster
Musical instrument - Wikipedia
Musical instrument | History, Characteristics, Examples, & Facts
Musical Instruments Portal | Britannica
List of musical instruments - Wikipedia
INSTRUMENT | English meaning - Cambridge Dictionary
Musical instrument - Classification, Types, Families | Britannica
Musical instruments explained: a beginner's guide - Classic FM
INSTRUMENT | definition in the Cambridge English Dictionary
INSTRUMENT Definition & Meaning | Dictionary.com