compressor

American  

[kuhm-pres-er] / kəmˈprɛs ər /

noun

1. a person or thing that compresses.

2. Anatomy. a muscle that compresses some part of the body.

3. Surgery. an instrument for compressing a part of the body.

4. a pump or other machine for reducing volume and increasing pressure of gases in order to condense the gases, drive pneumatically powered machinery, etc.

5. Electronics. a transducer that produces an output with a range of voltages whose ratio is smaller than that of the range of the input signal.

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compressor British  

/ kəmˈprɛsə /

noun

1. any reciprocating or rotating device that compresses a gas

2. the part of a gas turbine that compresses the air before it enters the combustion chambers

3. any muscle that causes compression of any part or structure

4. a medical instrument for holding down a part of the body

5. an electronic device for reducing the variation in signal amplitude in a transmission system Compare expander compander

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Etymology

Origin of compressor

First recorded in 1745–55; compress + -or ²

Example Sentences

The refrigerant evaporates and goes through a compressor which raises its temperature further.

From BBC • Nov. 5, 2025

It wasn’t easy: The half-ton compressor needed to drive the team’s large pneumatic drill was too heavy for their helicopter.

From Science Magazine • Dec. 2, 2024

One utility staffer said in 2020 that the plant’s compressor units had been leaking gas “for the last couple years.”

From Los Angeles Times • Nov. 22, 2024

When it’s cold outside, the process is reversed: Heat from the chilly outdoor air is extracted and delivered indoors with the help of refrigerants and a compressor.

From Seattle Times • May 13, 2024

I shrug like it’s no big deal, glancing at the compressor to double-check that everything is hooked up right.

From "Five Feet Apart" by Rachael Lippincott