The metre or meter is the base unit of length in the International System of Units. The SI unit symbol is m. The metre is currently defined as the length of the path travelled by light in a vacuum in 1/299 792 458 of a second.

Whats is the meaning of meter?

: the base unit of length in the International System of Units that is equal to the distance traveled in a vacuum by light in 1/299,792,458 second or to about 39.37 inches. meter. noun. Medical Definition of meter (Entry 2 of 2) : an instrument for measuring and sometimes recording the time or amount of something.

What does the root word meter mean?

Root: meter, metr. Meaning: measure.