without obstructions to passage or view; "the openness of
the prairies"
characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive Synonym(s):openness, nakedness Antonym(s):closeness, secretiveness
willingness or readiness to receive (especially impressions or ideas); "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" Synonym(s):receptiveness, receptivity, openness
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Openness \O"pen*ness\, n.
The quality or state of being open.