engineer

engineer — noun

1. a person who designs and creates machines, buildings, roads, or electrical syste

1.nounB1
Definition

a person who designs and creates machines, buildings, roads, or electrical systems by putting scientific and mathematical knowledge into practice.

Example

Yael works as a civil engineer for the city, helping to design safer roads and bridges.

collocation: civil engineer

Aoi decided to become a software engineer after building her first mobile app in high school.

collocation: software engineer

Common collocations
  • civil engineer
  • software engineer
  • mechanical engineer
  • structural engineer
  • professional engineer
  • qualified engineer
  • electrical engineer
  • chief engineer
Synonyms
  • designer

    Broader term; a designer may create the look or function of something without applying engineering science.

  • architect

    Focuses on planning and designing buildings, not machines or systems.

  • technician

    More hands-on and less theory-based; technicians typically install, maintain, or repair rather than design.

Grammar Patterns

engineer + noun (specialisation)

Usage Note

Often used with a preceding specialisation label: civil engineer, software engineer, mechanical engineer — these indicate the specific branch of engineering the person works in.

Common Mistakes

He is an engineer of computer.
He is a computer engineer.
The specialisation usually comes before 'engineer' as a compound noun, not after it with 'of'.

2. a person whose occupation is to fix, check, or run mechanical or electrical devi

2.nounB1
Definition

a person whose occupation is to fix, check, or run mechanical or electrical devices and systems.

Example

Amani called a heating engineer when the boiler stopped working in the middle of winter.

collocation: heating engineer

The ship's engineer checked the main engine every two hours during the long voyage across the Atlantic.

Common collocations
  • heating engineer
  • aircraft engineer
  • service engineer
  • maintenance engineer
  • marine engineer
  • sound engineer
Synonyms
  • technician

    Commonly used for the same role; 'technician' often implies less formal theoretical training than 'engineer'.

  • mechanic

    Restricted to mechanical equipment such as vehicles; does not cover electrical or electronic systems.

  • operator

    Focuses on running a machine rather than repairing it.

Grammar Patterns

engineer + noun (equipment type)

Usage Note

In this sense the focus is on maintenance and operation rather than original design. Common in industries such as shipping, aviation, and building services.

3. the person who drives a train, especially a steam locomotive or diesel engine.

3.nounB2
Definition

the person who drives a train, especially a steam locomotive or diesel engine.

Example

The elderly engineer gently brought the steam locomotive to a stop at the small countryside station.

Yuki waved to passengers from the cab as the engineer slowly pulled the train away from the platform.

British variety: engineer = train driver

Common collocations
  • steam engineer
  • train engineer
  • railway engineer
Synonyms

Usage Note

This sense is primarily British English. In American English the same role is called a train engineer or locomotive engineer. 'Engineer' by itself in the US would almost always mean sense 1.

Common Mistakes

The engineer stopped the bus at the station.
The engineer stopped the train at the station.
In BrE, an engineer drives a train, not a bus.

engineer — verb

Word family

Synonym discussion

Sense: noun/1

An engineer applies scientific and mathematical principles to design and create systems, structures, or products — typically requiring a university degree in an engineering discipline. A technologist is more application-oriented: they implement and manage existing technologies in fields such as medical imaging or information technology, often with a specialised diploma rather than a full engineering degree. A technician works closest to the hands-on level, installing, testing, and repairing equipment under the guidance of engineers or technologists. In practice the lines blur: a software engineer and a software technologist may do similar work, but the term 'engineer' is legally protected in some countries and implies a broader theoretical foundation. If you see blueprints and stress calculations, the person is likely an engineer. If you see someone running diagnostic tests on a broken MRI machine, that person is probably a technician.

engineer ↗technologisttechnician ↗

Common collocations

Nouns

Adverbs

Phrases

  • work as an engineer
  • train as an engineer
  • qualify as an engineer
  • a team of engineers
  • engineering design
  • engineering principles

Prepositions

Etymology

LatinOld FrenchMiddle EnglishModern English

The word 'engineer' comes from Latin 'ingenium' (natural ability, cleverness), which also gives us 'ingenuity'. In medieval times an 'engigneor' was a person who built military engines such as catapults and siege towers. The role expanded during the Industrial Revolution to include designers of steam engines, bridges, and railways. The modern distinction between 'engineer' as a design professional and 'technician' as a hands-on operator emerged in the 19th century.