Proportionality (disambiguation)

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The word proportionality may have one of a number of meanings:

In mathematics, proportionality is a mathematical relation between two quantities.
In law and politics, proportionality is a maxim in some theories of governance and a principle underpinning the constitution of the European Union.
In politics, proportional representation is a democratic electoral system.
In typography, a proportional font is a font whose glyphs are displayed using varying widths.