progressist

[prog-res-ist, -ruh-sist or, esp. British proh-gres-ist, -gruh-sist]
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noun

a person favoring progress, as in politics; progressive.

Origin of progressist

First recorded in 1840–50; progress + -ist
Related formsprog·ress·ism, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Historical Examples of progressist