Learner's definition of FOUNDATION
1 a : a usually stone or concrete structure that supports a building from underneath b : something (such as an idea, a principle, or a fact) that provides support for something
He insists that these charges are without foundation. [=are unfounded]
These charges have no foundation in fact. [=there are no facts that support these charges]
The book explains the moral foundations on which her political career was built.
These problems threaten the very foundations of modern society.
The scandal has shaken the government to its foundations.
Her early research laid the foundation [=provided the basis] for many important medical discoveries.
2 [count] : an organization that is created and supported with money that people give in order to do something that helps society 3 [count, noncount] : a special cream that is the color of your skin and that you spread on your face and neck before putting on other makeup 4 [noncount] : the act of founding something