The metre is defined as the distance travelled by light in a specific fraction (1/299,792,458) of a second.
Revisions in the definition of the meter are intended to achieve greater precision.
In the SI measurement system, a meter is a "base unit". However, the definition relies on the prior definition of the second.
A 100 centimeters.
One meter is the distance that light travels in a vacuum in 1⁄299,792,458 of a second.
A decimeter is one tenth of a meter.
1 Square Meter is the area enclosed by a length of 1 meter and a width of 1 meter. It is equal to 11.111... square feet.
This might be a "quick" definition of a taxi cab.
unit for measuring length
I don't think that there is a wave with that name; it might refer to a wave that has a wavelength of approximately a meter.
It was not. The current definition was established in 1983.
The current definition of the meter is in terms of the speed of light: "... the distance travelled by light in free space in 1⁄299,792,458 of a second".
something that measures water