(uncountable) The quality or condition of being instrumental; serving a purpose, being useful. / (countable, law) A governmental organ with a specific purpose.

(rare) Usefulness or agency, as means to an end; instrumentality / (music) How likely the music contains no spoken word vocals

By means of an instrument or agency; as means to an end / With instruments of music

essential or central; of great importance or relevance. / Serving as an instrument, medium, means, or agency.

(grammar) The instrumental case. / (music) A composition written or performed without lyrics, sometimes using a lead instrument to replace vocals.

A device used to produce music. / A means or agency for achieving an effect. / A measuring or displaying device. / A tool, implement used for manipulation or measurement.

(transitive) To apply measuring devices. / (transitive) To devise, conceive, cook up, plan. / To perform upon an instrument; to prepare for an instrument.

The act of using or adapting as an instrument; a series or combination of instruments

plural of instrument

Third-person singular simple present indicative form of instrument