illusion

n.

1. 错觉, 幻想, 错误观念
   • The sun appears to go round the Earth, but it's an illu -sion.
     太阳看起来好像绕着地球转, 但这只是个错觉。
2. 假象
   • The mirrors all round the walls give an illusion of greater space.
     墙壁周围的镜子造成一种较大空间的假象。