mindmap root((虚幻)) delusion implies self-deception or deception by others concerning facts or situations and typically suggests a disordered state of mind: suffered from a ~ that his family hated him. illusion implies ascribing truth or reality to something that seems to be true or real but in fact is not: clung to the ~ of happiness. hallucination implies the perception of visual or other sensory impressions that have no reality but are the product of disordered function: suffered from terrifying ~s. mirage is comparable with the foregoing words in an extended sense in which it applies to vision, dream, hope, or aim that is illusory: the dream of peace was but a ~.