Instrumental meaning

ĭn'strə-mĕn'tl
The definition of an instrumental is a song or part of a song for musical instruments.

An example of an instrumental is a part of a song that has all instruments and no lyrics.

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Instrumental is defined as necessary or helpful, or relating to musical instruments.

An example of something instrumental is a strong mathematical ability to winning a math bee.

An example of instrumental used as an adjective is in the phrase "instrumental song," which means a song that is made up entirely of musical instruments and has no words.

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Serving as a means or agency; implemental.

Was instrumental in solving the crime.

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Of, relating to, or accomplished with an instrument or tool.
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Performed on or written for an instrument.
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Of, relating to, or being the case used typically to express means, agency, or accompaniment.
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Of or relating to instrumentalism.
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The instrumental case.
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A word or form in the instrumental case.
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Serving as a means; helpful (in bringing something about)
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Of or performed with an instrument or tool.
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Of, performed on, or written for a musical instrument or instruments.
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Of or in keeping with instrumentalism.
adjective
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Designating, of, or in the case of nouns, pronouns, or adjectives expressing means or agency.
adjective
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A composition for a musical instrument or instruments.
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The instrumental case: this case is expressed by inflection in Old English, Sanskrit, Russian, etc., and in English with the prepositions by or with (Ex.: OE ðȳ spere, “by the spear, with the spear”)
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A word or phrase in this case.
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Acting as an instrument; serving as a means; contributing to promote; conductive; helpful; serviceable; essential or central.

He was instrumental in conducting the business.

adjective
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(music) Pertaining to, made by, or prepared for, an instrument, especially a musical instrument.

Instrumental music.

adjective
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(grammar) Applied to a case expressing means or agency, generally indicated in English by by or with with the objective.

The instrumental case.

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(uncountable, grammar) The instrumental case.
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(countable, music) A composition without lyrics.
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A composition for one or more instruments, usually without vocal accompaniment.
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Origin of instrumental

From Middle English, from Medieval Latin instrumentalis, from instruere (“to build into, set up, construct, furnish, hence "to train"”), from in- (“on”) + struere (“to put together, arrange, pile up, build, construct”), from Proto-Indo-European *strew- (“to spread, to strew”).