The term "mm" can refer to millimeters, a unit of measurement in the metric system. One millimeter is equal to one-thousandth of a meter. It is commonly used in various fields, including engineering, manufacturing, and science, to measure small distances or dimensions. In a different context, "mm" can also represent "millimetre," which is the British English spelling of the same unit. This unit is essential for precision in tasks such as crafting, construction, and design, where accurate measurements are crucial for quality and functionality.