Definition

1. Noun:
   • A transmission system: A mechanism in a motor vehicle that provides power directly to all four wheels simultaneously, improving traction.
   • A vehicle: A motor vehicle equipped with such a transmission system.

Usage

• The term "four-wheel drive" is used to describe both the technology itself and the vehicles that utilize it. It is often abbreviated as "4WD" or "4x4".
• It is commonly used when discussing vehicles designed for off-road conditions, poor weather, or situations requiring enhanced grip.

Examples

• Noun (Transmission):
  • The truck's main advantage is its durable four-wheel drive.
  • Engaging the four-wheel drive is necessary for climbing this steep, muddy hill.
• Noun (Vehicle):
  • We rented a four-wheel drive to explore the mountain trails.
  • During the snowstorm, only four-wheel drives were able to navigate the roads safely.

Advanced Usage

• "Part-time four-wheel drive": A system where the driver must manually select to engage power to all four wheels, typically used only when needed for off-road or slippery conditions.
• "Full-time four-wheel drive": A system where power is constantly delivered to all four wheels, often found in vehicles designed for consistent all-weather performance.
• "To have four-wheel drive": To be equipped with this system.
  • Does this model have four-wheel drive?

Variants and Related Words

• 4WD (n): A common abbreviation for "four-wheel drive".
• 4x4 (n): Another common abbreviation (pronounced "four-by-four"), often used interchangeably with "four-wheel drive" to refer to the vehicle.
• All-wheel drive (AWD) (n): A different system that also powers all four wheels but is typically designed for enhanced on-road traction rather than rugged off-road use. It is often automatically engaged.

Synonyms

• 4x4 (n): (When referring to the vehicle)
• Off-road vehicle (n): (A general category that often, but not always, includes four-wheel drives)

Related Phrases

• To engage the four-wheel drive: To activate the 4WD system.
  • Remember to engage the four-wheel drive before leaving the paved road.
• Four-wheel drive capability: The feature or ability of a vehicle to function with power to all wheels.
  • This SUV is popular for its four-wheel drive capability.

Noun

1. a transmission that provides power directly to all four wheels of a motor vehicle
2. a motor vehicle with a four-wheel drive transmission system