Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
The SI unit is the International System of Units, which provides a standardized system for measuring physical quantities. In the context of meters, it refers to the fundamental unit used to measure length.
Related terms
Kilometer: A metric unit equal to 1000 meters.
Centimeter: A metric unit equal to 1/100th of a meter.
Millimeter: A metric unit equal to 1/1000th of a meter.