instrument

American  

[in-struh-muhnt] / ˈɪn strə mənt /

noun

1. a mechanical tool or implement, especially one used for delicate or precision work.

   surgical instruments.

2. a contrivance or apparatus for producing musical sounds.

   a stringed instrument.

3. a means by which something is effected or done; agency.

   an instrument of government.

4. a device for measuring the present value of a quantity under observation.

5. a mechanical or electronic measuring device, especially one used in navigation.

   landing a plane by instruments.

6. a formal legal document, as a draft or bond.

   negotiable instruments.

7. a person used by another merely as a means to some private end; tool or dupe.

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verb (used with object)

1. to equip with instruments, as a machine or manufacturing process.

   to instrument a space vehicle.

2. to arrange a composition for musical instruments; orchestrate.

instrument British  

noun

1. a mechanical implement or tool, esp one used for precision work

   surgical instrument

2. music any of various contrivances or mechanisms that can be played to produce musical tones or sounds

3. an important factor or agency in something

   her evidence was an instrument in his arrest

4. informal a person used by another to gain an end; dupe; tool

5. a measuring device, such as a pressure gauge or ammeter

6. 1. a device or system for use in navigation or control, esp of aircraft

   2. ( as modifier )

      instrument landing

7. a formal legal document

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verb

1. another word for orchestrate

2. to equip with instruments

Usage

What are other ways to say instrument? An instrument is a mechanical contrivance, especially one used for delicate or precision work. When should you use this noun over tool, implement, or utensil? Learn more on Thesaurus.com. 

Other Word Forms

• underinstrument noun

Etymology

Origin of instrument

First recorded in 1250–1300; Middle English, from Latin instrūmentum equipment, equivalent to instrū-, stem of instruere “to equip” ( instruct ) + -mentum -ment

Example Sentences

A cartridge containing small tubes preloaded with different antibiotics is placed directly into the urine sample and inserted into an instrument.

From Science Daily • Mar. 31, 2026

To better understand the host galaxy, Sears led follow-up observations using Webb's NIRCam, its main near-infrared imaging instrument, several months after the event.

From Science Daily • Mar. 30, 2026

Trump has made tariffs a central instrument of his economic and foreign policy.

From Barron's • Mar. 27, 2026

In high school, Joel picked up the accordion — he describes playing the 49-key instrument as a “love-hate” situation — and Leonel the bajo quinto.

From Los Angeles Times • Mar. 25, 2026

A high note rang out before I offered the instrument to Miss Mathis.

From "The Red Car to Hollywood" by Jennie Liu

Related Words

• apparatus
• appliance
• device
• equipment
• gadget
• gear
• gizmo
• machine
• machinery
• mechanism