Metre
The metre 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 1/299792458 of a second, where the second is defined by a hyperfine transition frequency of caesium.
Read Full WikiDEFINITIONS
- noun(always meter) A device that measures things.
- noun(always meter) A parking meter or similar device for collecting payment.
- verbTo measure with a metering device.
- verbTo imprint a postage mark with a postage meter.
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