- an optical phenomenon, especially in the desert or at sea, by which the image of some object appears displaced above, below, or to one side of its true position as a result of spatial variations of the index of refraction of air.
- something illusory, without substance or reality.
- any of a series of supersonic, delta-wing, multirole French fighter-bombers.
- an image of a distant object or sheet of water, often inverted or distorted, caused by atmospheric refraction by hot air
- something illusory
