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The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of 1 / 299 792 458 of a second, where the second is defined by a hyperfine transition frequency of caesium. [2]The metre was originally defined in 1791 by ...
Learn how to spell and use meter and metre, two forms of the same word that refer to a unit of length in the metric system. Meter is preferred in American English, while metre is used in British English and other varieties.
Metre is a unit of length in the metric system, equal to 100 centimetres. It is also a unit of poetry and music, and a word with different meanings in English and French.
Learn the meaning and pronunciation of metre, a metric unit of length and a poetic term for rhythm. Find out how to use metre in sentences and compare it with meter in American English.
A metre is the basic unit of length in the SI measurement system, defined as the distance light travels in a vacuum in 1/299,792,458 of a second. Learn about the history, multiples and related units of the metre.
Learn about the metre, the fundamental unit of length in the metric system and the International Systems of Units. Find out how it was defined by the French Academy of Sciences, the International Bureau of Weights and Measures, and the speed of light.
Learn about the history and definition of the metre, the SI unit of length, and how it relates to other units such as feet, miles and kilometres. Find out how long it would take to walk or drive around the Earth in metres or other units.
The difference between Meter and Metre lies mainly in their usage across different English-speaking regions.Meter is commonly used in American English, while Metre is the preferred spelling in British English. Both terms refer to a unit of length in the International System of Units (SI). For example, one might say, "The tree is about 10 meters tall," in the United States, whereas in the ...
Whether you choose metre or meter, you refer to the same thing: a unit of measurement for length established by the International System of Units (SI).The word metre or meter refer also to the terms used in poetry or music. However, for various devices designed to measure different entities, only the spelling meter is correct. Hence, we can talk of a manometer, barometer, thermometer or ammeter.
The meaning of METRE is chiefly British spelling of meter.