per mill

or per mil

[pur mil, per]

adverb

per thousand.

Origin of per mill

First recorded in 1900–05

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for per mill

per mill

per mil

adverb

by the thousand or in each thousand

Word Origin for per mill

C19: from per + French or Latin mille thousand, on the model of per cent

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012