lacking worldly experience and understanding, especially simple and guileless, artless, and credulous. Showing or characterized by a lack of sophistication and critical judgement. Connotes credulity that impedes effective functioning in a practical world. Complete absence of complexity in thought. Unconcern for the reaction produced by others, which usually comes from a deeply rooted conceit and pompous lack of humility. Often this is a characteristic of a person who has not experienced the world and has too closely held archetypes. Idealistic.