This article concerns content exclusive to the original World of Warcraft game release.
In World of Warcraft, Aberrations are a creature-type appearing in-game often as offshoots of some undead or elementals.   The most well known are faceless ones, oozes, sludges, and void creatures. They are often confused with uncategorized creatures, but differ in that they usually have similarities or hybrid traits of other creature types. One of the more recently added type, most of the creatures were previously considered uncategorized creatures.