What is the meaning of openness?

noun

• Without obstructions to passage or view.
  • usage: "the openness of the prairies"
• Characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive.
  • synonyms: nakedness
• Willingness or readiness to receive (especially impressions or ideas. )
  • usage: "he was testing the government's receptiveness to reform"; "this receptiveness is the key feature in oestral behavior, enabling natural mating to occur"; "their receptivity to the proposal"
  • synonyms: receptiveness, receptivity