- Sciamachy is a fight with imaginary attackers.
An example of sciamachy is a bipolar person having a psychotic episode and imagines they are being ambushed.
sciamachy definition by Webster's New World
noun pl. sciamachies
a fighting with shadows or imaginary enemies
Origin: Classical Greek skiamachia ; from skia, shadow (see shine) plush machein, to fight (see -machy)