definition of
foundation

[1] #1 foundation n. the basis on which something is grounded; "there is little foundation for his objections". wn

[2] #2 foundation n. an institution supported by an endowment. wn

[3] #3 foundation n. [base, fundament, foot, groundwork, substructure, understructure] lowest support of a structure; "it was built on a base of solid rock"; "he stood at the foot of the tower". wn

[4] #4 foundation n. [grounding] education or instruction in the fundamentals of a field of knowledge; "he lacks the foundation necessary for advanced study"; "a good grounding in mathematics". wn

[5] #5 foundation n. [basis, base, fundament, groundwork, cornerstone] the fundamental assumptions from which something is begun or developed or calculated or explained; "the whole argument rested on a basis of conjecture". wn