Definition of proportional adjective from the Oxford Advanced Learner's Dictionary



BrE BrE//prəˈpɔːʃənl//
; NAmE NAmE//prəˈpɔːrʃənl//
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proportional (to something) increasing or decreasing in size, amount or degree according to changes in something else Salary is proportional to years of experience. The number of teachers appointed is proportional to the total number of students. to be directly/inversely proportional to something Word Origin late Middle English: from late Latin proportionalis, from proportio(n-), from pro portione ‘in respect of (its or a person's) share’.Extra examples The amount of food a child needs is roughly proportional to its size. The amount of force needed is inversely proportional to the rigidity of the material. The speed of the glider is directly proportional to the speed of the wind. Salary is directly proportional to years of experience.
See the Oxford Advanced American Dictionary entry: proportional

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