four-by-four

IPA/ˈfɔː baɪ fɔː(r)/
IPA/ˈfɔːr baɪ fɔːr/

four-by-four — noun

1. a car or truck built with a drivetrain that drives every wheel rather than only

1.nounB1
Definition

a car or truck built with a drivetrain that drives every wheel rather than only two, providing extra control and grip on slippery or uneven surfaces such as mud, snow, or rocky trails

Example

Mira took her four-by-four up the steep mountain road to reach the remote village.

possessive determiner: her four-by-four

The park ranger drove a four-by-four across the muddy field to check the fence line.

article + noun: a four-by-four

Common collocations
  • drive a four-by-four
  • own a four-by-four
  • used four-by-four
  • old four-by-four
  • rugged four-by-four
  • four-by-four vehicle
  • four-by-four truck
  • four-by-four owner
Synonyms
  • 4x4

    exact synonym, more common in writing and labels

  • off-road vehicle

    broader term; includes vehicles built for rough terrain even without four-wheel drive

  • SUV

    a sport utility vehicle, many of which have four-wheel drive, but not all

Antonyms

Usage Note

Often shortened informally to '4x4' in both speech and writing. The plural form is 'four-by-fours' (or '4x4s'). 'Four-by-four' refers to the vehicle itself, while 'four-wheel drive' refers specifically to the drivetrain system inside the vehicle.

Common Mistakes

I bought a four-by-four car.
I bought a four-by-four.
'four-by-four' already means a vehicle, so adding 'car' is redundant.
My car has four-by-four.
My car has four-wheel drive.
'four-by-four' is a noun for the vehicle, not the drivetrain system.

Synonym discussion

Sense: noun/1

A 'four-by-four' (also written '4x4') refers specifically to a vehicle whose drivetrain sends power to all four wheels. 'SUV' (sport utility vehicle) describes a body style — a tall, boxy car with rear cargo space — and while many SUVs have four-wheel drive, some do not. 'Off-road vehicle' is a broader category that includes four-by-fours, ATVs, dirt bikes, and other vehicles designed for unpaved surfaces. 'Jeep' is a brand name that has become a generic term for rugged small off-road vehicles, though not all Jeeps have four-wheel drive. For example: 'She bought a four-by-four so she could drive to the mountain cabin in winter' (specific drivetrain focus). 'He drives an SUV because he needs space for his kids and their sports equipment' (body style/practicality focus).

4x4 ↗SUV ↗off-road vehiclejeep ↗

Common collocations

Nouns

Etymology

English

From the drivetrain designation '4×4', which means a vehicle with four wheels, all four of which are driven by the engine. The term was first used as a technical label in automotive engineering in the early 20th century and gradually became an everyday noun for any vehicle equipped with four-wheel drive.

First known use

1937

1937, in the meaning defined above