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.

Jan 30, 2026 · 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 …

METRE definition: 1. a unit of measurement equal to 100 centimetres: 2. the regular arrangement of syllables in…. Learn more.

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.

Definition of metre noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

The spelling 'meter' is used in American English, derived from the Greek word 'metron', while 'metre' follows British English conventions. The primary difference lies in regional usage, with 'metre' favored …

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.

The metre is now defined as the distance light travels in a vacuum in 1/299,792,458 of a second. [1] In the imperial system of measurement, one yard is 0.9144 metres (after international agreement in …

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

Feb 15, 2026 · metre (plural metres) The basic unit of length in the International System of Units (SI: Système International d'Unités), equal to the distance travelled by light in a vacuum in 1/299 792 458 …