A meter is a unit of measure used to quantify the amount of something, such as electrical current, length, or volume. The International System of Units (SI) defines the meter as the distance traveled by light in a vacuum in 1/299,792,458 of a second. In other words, the meter is the distance light travels in a vacuum in 1/299,792,458 of a second. What size is a meter? A meter is a unit of length in the International System of Units (SI). The SI unit of length is the meter. One meter is the distance traveled by light in a vacuum in 1/299,792,458 of a second. What is 1 meter called? The meter is the SI unit of length. It is defined as the length of the path travelled by light in a vacuum in 1/299,792,458 of a second. What is the unit in meter? A meter is a unit of length in the International System of Units (SI). The meter is the SI unit of length and is equal to the length of the path traveled by light in a vacuum in 1/299,792,458 of a second. What uses a meter? A meter is a unit of measure, and as such is used to quantify the size or quantity of something. In the context of IT standards and organizations, a meter is often used to measure the length or size of data cables or other physical objects. What distance is a meter? A meter is a unit of length in the International System of Units (SI). The SI unit of length is the meter. The meter is defined as the length of the path traveled by light in a vacuum in 1/299,792,458 of a second.