| meter | has symbol m |  |
| has consequence fixes the speed of light in vacuum at exactly 299792458 m·s-1 |  |
| has approval agency 11th CGPM |  |
| has approval date 1960 |  |
| has historical origin chosen in 1791 by the French Academy of Sciences as 10-7 of the length of the meridian through Paris from pole to the equator |  |
| has definition A unit of length. The meter is the length equal to 1650763.73 wavelengths in vacuum of the radiation corresponding to the transition between the levels 2p10 and 5d5 of the Krypton-86 atom. |  |
| has definition length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second |  |
| is an instance of length unit |  |
| is an instance of base SI unit |  |
| length unit | is a unit of length |  |
| unit | represents |  |
| SI unit | is an acronym for Syteme Internationale |  |