WORD ORIGIN verb (used without object), pro·rat·ed, pro·rat·ing. to make an arrangement on a basis of proportional distribution. verb (used with object), pro·rat·ed, pro·rat·ing. to divide, distribute, or calculate proportionately. Origin of prorate 1855–60, Americanism
; partial translation of
pro rata Related forms pro·rat·a·ble, adjective pro·ra·tion, noun
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for prorating verb mainly US and Canadian to divide, assess, or distribute (something) proportionately Derived Forms proratable, adjective proration, noun Word Origin for prorate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for prorating v.
pro-rate, "divide proportionally," 1860, American English, verb derived from Latin pro rata (parte) (see pro rata). Related: Prorated; prorating.
Online Etymology Dictionary, © 2010 Douglas Harper
To divide or distribute a sum of money proportionately. For example, if one owned an automobile for only three months, an insurance company would prorate the annual premium by charging only one-quarter of it.
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