horsepower
Definition
Noun: A unit of measurement for power, especially the power of engines and motors. One horsepower is formally defined as the power needed to lift 550 pounds by one foot in one second, which is equivalent to 746 watts.
Usage
This word is used as a countable noun to quantify and compare the output power of engines, motors, and other mechanical systems. It is a standard unit in automotive and engineering contexts. - The singular form is horsepower. - The plural form is horsepower (often used with a number, e.g., "300 horsepower").
Examples
- The new sports car boasts an impressive 450 horsepower.
- How much horsepower does this tractor's engine produce?
- The electric motor is rated at 5 horsepower.
Advanced Usage
- Brake horsepower (bhp): A specific measurement of an engine's power output taken at the engine's crankshaft, before losses from the transmission and other components.
- The engine develops 200 brake horsepower.
- Metric horsepower (PS): A slightly different unit of power used in some countries, approximately equal to 735.5 watts.
- The European model is listed at 150 PS.
Variants and Related Words
- hp: The common abbreviation for horsepower.
- The outboard motor is a 90 hp model.
Synonyms
- Power: (General term) The rate at which work is done or energy is transferred.
- Output: (General term) The amount of something produced by a machine or system.
Related Phrases
- Under the hood: (Idiom) Often used to refer to a car's engine and its specifications, including horsepower.
- Let's see what's under the hood—this model has serious horsepower.
- Horsepower race: (Term) Refers to competition among manufacturers to produce vehicles with ever-increasing engine power.
- The horsepower race of the 1960s led to some iconic muscle cars.
Noun
-
a unit of power equal to 746 watts
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