What is the meaning of internal?

adjective

• Happening or arising or located within some limits or especially surface.
  • usage: "internal organs"; "internal mechanism of a toy"; "internal party maneuvering"
• Occurring within an institution or community.
  • usage: "intragroup squabbling within the corporation"
  • synonyms: intragroup
• Inside the country.
  • usage: "the British Home Office has broader responsibilities than the United States Department of the Interior"; "the nation's internal politics"
  • synonyms: home, interior, national
• Located inward."Beethoven's manuscript looks like a bloody record of a tremendous inner battle- Leonard Bernstein; "she thinks she has no soul, no interior life, but the truth is that she has no access to it- David Denby; "an internal sense of rightousness- A. R. Gurney, Jr.
  • synonyms: inner, interior
• Innermost or essential.
  • usage: "the inner logic of Cubism"; "the internal contradictions of the theory"; "the intimate structure of matter"
  • synonyms: inner, intimate