Definition of base unit in US English:

base unit


  • A fundamental unit that is defined arbitrarily and not by combinations of other units. The base units of the SI system are the meter, kilogram, second, ampere, kelvin, mole, and candela.

    • ‘The seven base units of the SI system, each of which is used for a particular physical quantity, are shown in figure 1.’
    • ‘Individual starch grains were used as the base unit of analysis for these experiments (as opposed to analysing the positions of entire amyloplasts).’
    • ‘This is actually a very common ‘computer science’ problem, and can be easily solved by standardizing the base unit of time.’
    • ‘The base unit for M-MESes was the Spear, each with five M-MESes.’
    • ‘In the metric system, the base unit of weight is the gram; in the avoirdupois system, it's the pound.’