bottom-up

[ bot-uh m-uhp ]
/ ˈbɒt əmˈʌp /
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adjective

of, relating to, or originating with the common people, nonprofessionals, or the lower ranks of an organization: The five-day workweek was a bottom-up movement some business leaders and politicians finally supported.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for bottom-up

bottom-up


adjective

from the lowest level of a hierarchy or process to the topa bottom-up approach to corporate decision-making
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