The term 'Metric' primarily refers to the Metric System, a decimal-based system of measurement used worldwide. It includes units such as meters for length, kilograms for mass, and liters for volume, providing a standardized way to measure and compare quantities across different fields and disciplines. Adopted by most countries, the Metric System simplifies calculations and conversions due to its base-10 structure. This system is essential in science, engineering, and everyday life, ensuring consistency and clarity in measurements, which is crucial for global communication and trade.