'openness' definitions:

Definition of 'openness'

From: WordNet
noun
Without obstructions to passage or view; "the openness of the prairies"
noun
Characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive [syn: openness, nakedness] [ant: closeness, secretiveness]
noun
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" [syn: receptiveness, receptivity, openness]

Synonyms of 'openness'

From: Moby Thesaurus