bottom-up

US: (bot′əm up′)

WordReference Random House Unabridged Dictionary of American English © 2026

bot•tom-up  (bot′əm up′), adj. 

1. of, pertaining 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.

Collins Concise English Dictionary © HarperCollins Publishers::

bottom-up adjective

1. from the lowest level of a hierarchy or process to the top: a bottom-up approach to corporate decision-making