1. 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.
2. something illusory, without substance or reality.
3. military; any of a series of supersonic, delta-wing, multirole French fighter-bombers.
Origin of mirage 1795-1805; French, equivalent to see, mirror, to look at oneself, be reflected < Latin mīrārī to wonder at.
2. illusion, phantom, fancy.