1. without obstructions to passage or view - the openness of the prairies • Derivationally related forms: open • Hypernyms: spacing, spatial arrangement • Hyponyms: patency 2. characterized by an attitude of ready accessibility (especially about one's actions or purposes); without concealment; not secretive • Syn: nakedness • Ant: closeness • Derivationally related forms: naked (for: nakedness), open • Hypernyms: sociability, sociableness 3. 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 • Derivationally related forms: open, receptive (for: receptivity), receptive (for: receptiveness) • Hypernyms: willingness