motor

motor — noun

1. a part inside a machine that uses electrical power or fuel to create motion, all

1.nounB1
Definition

a part inside a machine that uses electrical power or fuel to create motion, allowing the machine to run

Example

The fan's motor stopped working after the power surge damaged it.

Élise opened the back of the toy car and checked the small motor.

motor + in [object] to show location inside a device

Common collocations
  • electric motor
  • motor runs
  • motor powers
  • motor drives
  • small motor
  • quiet motor
Synonyms
  • engine

    used for vehicles and larger machines that burn fuel; less common for small electric devices

  • machine

    much more general term for any device that does work, not specific to the power source

Common Mistakes

The engine of my electric fan is broken.
The motor of my electric fan is broken.
'Engine' usually refers to machines that burn fuel; 'motor' is more common for devices that use electricity.

2. a car — used as an informal or slightly old-fashioned term, mainly in British En

2.nounB1
Definition

a car — used as an informal or slightly old-fashioned term, mainly in British English

Example

Shirin parked her motor in the garage behind the terraced house.

informal British: 'park + one's + motor'

My grandfather still calls every car a motor, even modern ones.

Common collocations
  • park the motor
  • old motor
  • second-hand motor
  • buy a motor
Synonyms
  • car

    the standard, neutral term; use 'car' in all registers

  • vehicle

    broader term covering cars, trucks, buses, etc.

Usage Note

This sense appears mainly in British English and sounds informal or somewhat dated. Most modern speakers prefer the word 'car'. It is not used for commercial vehicles like buses or trucks.

Common Mistakes

I need to fill up my motor with petrol.' (meaning a car)
I need to fill up my car with petrol.
Using 'motor' for 'car' is British and informal; learners at this level should use 'car' for everyday speech.

3. a person, event, or thing that provides the main energy or power behind progress

3.nounB2
Definition

a person, event, or thing that provides the main energy or power behind progress, change, or growth

Example

Élise was the motor behind the team's successful product launch.

person + 'was the motor behind' + achievement

Trade has been the main motor of economic growth in the region.

Common collocations
  • motor behind
  • motor of change
  • motor of growth
  • main motor
  • real motor
Synonyms
  • driving force

    more transparent and common in everyday English for the same figurative meaning

  • engine

    used similarly for the source of energy behind progress, e.g. 'engine of growth'

Usage Note

This is a figurative sense — the motor is not a physical machine but the driving force behind something. Often followed by 'of' or 'behind' + a noun phrase describing the result.

Common Mistakes

The motor of the meeting was very strong.
The driving force behind the meeting was very strong.
This figurative sense works best with abstract nouns like 'change', 'growth', or 'progress', not everyday events like meetings.

motor — adjective

motor — verb

Word family

Synonym discussion

Sense: noun/1

'Motor' and 'engine' are often used interchangeably in casual speech, but there is a useful distinction. A motor typically converts electrical energy into mechanical movement — you find motors in fans, washing machines, and electric cars. An engine usually burns fuel (petrol, diesel) to create movement — found in most traditional cars, aeroplanes, and lawnmowers. A generator does the opposite of a motor: it converts mechanical energy into electrical energy. In everyday use, 'engine' is the more common word for cars, while 'motor' is preferred for smaller electrical devices. For example: 'The car's engine started with a roar' versus 'The washing machine's motor needs replacing.'

Common collocations

Nouns

Phrases

  • motor vehicle
  • motor industry
  • motor skills
  • motor functions
  • motor cortex
  • motor show

Prepositions

Etymology

LatinEnglish

The word 'motor' comes from Latin 'motus', meaning 'movement', via the Latin verb 'movere' (to move). It entered English in the 15th century as a noun meaning 'one who moves' and later developed into the machine sense during the Industrial Revolution. The adjective and verb senses followed as motorised transport became widespread in the late 19th and early 20th centuries.