What is the meaning of foundation?

noun

• The basis on which something is grounded.
  • usage: "there is little foundation for his objections"
• An institution supported by an endowment.
• Lowest support of a structure.
  • usage: "it was built on a base of solid rock"; "he stood at the foot of the tower"
  • synonyms: base, fundament, foot, groundwork, substructure, understructure
• Education or instruction in the fundamentals of a field of knowledge.
  • usage: "he lacks the foundation necessary for advanced study"; "a good grounding in mathematics"
  • synonyms: grounding
• The fundamental assumptions from which something is begun or developed or calculated or explained.
  • usage: "the whole argument rested on a basis of conjecture"
  • synonyms: basis, base, fundament, groundwork, cornerstone
• A woman's undergarment worn to give shape to the contours of the body.
  • synonyms: foundation garment
• The act of starting something for the first time; introducing something new.
  • usage: "she looked forward to her initiation as an adult"; "the foundation of a new scientific society"
  • synonyms: initiation, founding, institution, origination, creation, innovation, introduction, instauration