A meter (m) is the standard unit of length in the International System of Units (SI). It is used to measure distances and is defined as the distance light travels in a vacuum in 1/299,792,458 seconds. This makes the meter a precise and universal measurement for various applications, from science to everyday use. Meters are commonly used in many fields, including construction, engineering, and sports. For example, a running track is often measured in meters, and a typical room might be around 10 meters long. Understanding meters helps people communicate measurements clearly and accurately.