n.错觉,幻想,错误观念,假象
This eerie calm is an illusion.
这种怪诞的平静是一种假象。
She laboured under the illusion that I knew what I was doing.
她有一个错觉,以为我知道自己在做什么。
Sloping walls on the bulk of the building create an optical illusion.
大楼主体的斜墙给人造成一种视错觉。