Noun
1. the basis on which something is grounded;
"there is little foundation for his objections"2. an institution supported by an endowment
3. the fundamental assumptions from which something is begun or developed or calculated or explained;
"the whole argument rested on a basis of conjecture"4. lowest support of a structure;
"it was built on a base of solid rock""he stood at the foot of the tower"5. education or instruction in the fundamentals of a field of knowledge;
"he lacks the foundation necessary for advanced study""a good grounding in mathematics"6. a woman's undergarment worn to give shape to the contours of the body
7. the act of starting something for the first time; introducing something new;
"she looked forward to her initiation as an adult""the foundation of a new scientific society""he regards the fork as a modern introduction"