Select the most appropriate antonym of the word.

ILLUSION

Reality

The most appropriate antonym of the word illusion is reality.

• Illusion means "a false or misleading appearance or impression."
• Reality means "the state of things as they actually exist, rather than as they may appear or be imagined."

The other words do not have the same meaning as illusion, so they are not its antonyms.

• Fantasy means "a fanciful or unrealistic idea or image."
• Hallucination means "a perception of something that is not actually there."
• Mirage means "an optical illusion caused by the refraction of light in the atmosphere, typically causing an image of a distant object or water to appear in a desert."