Length is a measure of the extent of an object or distance between two points. It is one of the fundamental dimensions in physics and is used to describe the size or distance of objects in one-dimensional space. Length can be measured in various units, such as meters, centimeters, inches, or feet, depending on the system of measurement being used. In geometry, length typically refers to the longest dimension of an object, while in everyday usage, it can also refer to the distance between two locations. Understanding length is essential in a wide range of fields, from construction and engineering to everyday tasks like measuring fabric or determining the size of a room.