Definition

1. Noun:
   • A unit of speed: "kilometres per hour" is a unit of measurement expressing the distance traveled in kilometres in one hour. It is a measure of speed or velocity.

Usage

• "Kilometres per hour" is used to quantify how fast something is moving. It is the standard unit of speed in countries using the metric system.
• It is commonly abbreviated as km/h or kph.
• It is used in contexts such as vehicle speed limits, wind speed measurements, and athletic performance.

Examples

• Noun:
  • The speed limit on this road is 50 kilometres per hour.
  • The hurricane had sustained winds of 120 kilometres per hour.
  • He ran the final kilometre at a pace of 15 kilometres per hour.

Advanced Usage

• "to travel at [number] kilometres per hour": to move at a specific speed.
  • The high-speed train can travel at over 300 kilometres per hour.
• "a top speed of [number] kilometres per hour": the maximum speed achievable.
  • The sports car has a top speed of 350 kilometres per hour.

Variants and Related Words

• km/h: The standard scientific and international abbreviation.
• kph: A common alternative abbreviation, often used in informal contexts or on vehicle speedometers.
• Kilometre (km): A unit of length in the metric system, equal to 1,000 metres.
• Hour (h): A unit of time equal to 60 minutes.

Synonyms

• Speed: The rate at which someone or something moves or operates. (Note: "speed" is the general concept, while "kilometres per hour" is a specific unit for measuring it.)

Related Phrases

• Miles per hour (mph): The imperial unit of speed, equivalent to travelling one mile in one hour.

Noun

1. the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)