Basic Guidelines For English Spellings
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See US English definition of illusion
See UK English definition of illusion
See Spanish definition of ilusión
1‘I was under no illusion about the difficulty of my job’
2‘the lighting helps to increase the illusion of depth’
reality
3‘the magical illusion is created using mirrors, lights, and paint’
4‘he is keen to dispel any impression that his illusions are achieved using TV trickery’