Definition of proportional
(Entry 1 of 2)
: a number or quantity in a proportion
proportional
adjectiveDefinition of proportional (Entry 2 of 2)
1a
: corresponding in size, degree, or intensity
b
: having the same or a constant ratio
corresponding sides of similar triangles are proportional
2
: regulated or determined in size or degree with reference to proportions
a proportional system of immigration quotas a proportional font/typeface [=a font/typeface with characters of various widths]
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Merriam-Webster unabridged
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Time Traveler for proportional
The first known use of proportional was in the 14th century
See more words from the same century