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Definition of instrumental adjective from the Oxford Advanced Learner's Dictionary

instrumental

adjective
 
/ˌɪnstrəˈmentl/
 
/ˌɪnstrəˈmentl/
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  1. important in making something happen
    • The Conservation Trust performs an instrumental role in the protection of rural environments.
    • instrumental in (doing) something He was instrumental in bringing about an end to the conflict.
    • They were highly instrumental in bringing the business to Newtown.
    Oxford Collocations Dictionaryverbs
    • be
    • prove
    • become
    adverb
    • highly
    • very
    • essentially
    preposition
    • in
    See full entry
  2. made by or for musical instruments
    • instrumental music
    • The songs are largely instrumental.
    Topics Musicc1
    Oxford Collocations Dictionaryverbs
    • be
    adverb
    • largely
    • mostly
    • entirely
    See full entry
  3. (grammar) (in some languages) in the form that a noun, pronoun or adjective has when it refers to a thing that is used to do something
    • the instrumental case
    compare ablative, accusative, dative, genitive, nominative, vocative
  4. Word Originlate Middle English: via French from medieval Latin instrumentalis, from Latin instrumentum, from the verb instruere, from in- ‘upon, towards’ + struere ‘pile up’.
See instrumental in the Oxford Advanced American DictionarySee instrumental in the Oxford Learner's Dictionary of Academic English

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