Where older traditional length measures are still used, they are now defined in terms of the metre – for example the yard has since 1959 officially been defined as exactly 0.9144 metre.

metre (m), in measurement, fundamental unit of length in the metric system and in the International Systems of Units (SI). It is equal to approximately 39.37 inches in the British Imperial and United …

In the study of poetry, metre is the regular and rhythmic arrangement of syllables according to particular patterns.

The difference lies in the geographic or cultural preference: meter is the preferred spelling in American English, while metre is preferred in British English and other forms of English outside the United States.

Illustrated definition of Metre | Meter: The basic unit of length (or distance) in the Metric System. The symbol is m Example: the length of this...

The metre is one of the seven fundamental units of measurement. 1 metre is equal to the path length covered by light in a given time in a vacuum, which is 1/299,792,458 of a second.

The effect of this definition is that one metre is the length of the path travelled by light in vacuum during a time interval with duration of 1 ⁄ 299 792 458 of a second.

In 1791 the French Academy of Sciences decided to adopt a new unit of measurement, called the metre, based on 1/10,000,000th of the distance from Earth's equator to the North Pole.

The SI unit of length, the metre (m), takes its name from Greek and French nouns for “measure”. The metre, along with the kilogram, was one of the first units of the metric system.

The metre, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s–1, where the second is …