If someone is living in a make-believe world, they are pretending that things are better, different, or more exciting than they really are instead of facing up to reality.
You use make-believe to refer to the activity involved when a child plays a game in which they pretend something, for example that they are someone else.
You use make-believe to describe things, for example in a play or film, that imitate or copy something real, but which are not what they appear to be.
例句
In the video, Michael Jackson danced down a make-believe street protesting that 'the kid is not my son'...录像里，迈克尔·杰克逊沿着虚设的街道一边跳舞一边抗议说：“那孩子不是我的儿子”。The violence in those films was too unreal, it was make-believe...那些影片里的暴力场面太不真实了，都是假的。
英汉词典释义
n.
假装
假扮者
adj.
假装的
虚构的；虚幻的
a make-believe story虚构的故事
英英词典释义
Noun
1. imaginative intellectual play
2. the enactment of a pretense;
"it was just pretend"
Adjective
1. imagined as in a play;
"the make-believe world of theater""play money""dangling their legs in the water to catch pretend fish"