Mi-rāge', n.

noun

(mī-räzh'), n. [Fr., from mirer, to look at carefully, to aim, se mirer, to look at one's self in a glass, to reflect, to be reflected. See MIRROR.] An optical illusion arising from an unequal refraction in the lower strata of the atmosphere, and causing remote objects to be seen double, as if reflected in a mirror, or to appear as if suspended in the air. It is frequently seen in deserts, presenting the appearance of water. The fata Morgana and looming are species of mirage.

The illustration depicts several floating, inverted-looking landforms above a distant shoreline, representing a mirage.
Mirage.