Systeme International D'unites, also known as the International System of Units, is a globally recognized standard for measurement that ensures uniformity, precision, and accuracy of measurements across various fields. Synonyms for this term include SI units, metric system, MKS units, and Systeme international. The SI units comprise seven fundamental units, namely, meter, kilogram, second, ampere, Kelvin, mole, and candela. These units can be used in combination to derive derived units like newton, joule, watt, etc. The system is widely used in scientific research, engineering, and international trade, and serves as a common language for measuring physical quantities.