An illusion.
An optical phenomenon in which light is refracted through a layer of hot air close to the ground, often giving the illusion of a body of water.
To cause to appear as or like a mirage.
The state of being actual or real; realness.
The entirety of all that is real.
The real world.
An individual observer's own subjective perception of that which is real.
A real entity, event, or other fact.