Aberrations are warped and twisted lifeforms in the fictional universes of the Dungeons & Dragons and Pathfinder pencil-and-paper roleplaying games by Wizards of the Coast and Paizo Inc.
Aberrations are creatures which are utterly alien to the cosmos and its parallel planes. In the D&D multiverse, they either came from the Far Realm or were touched by it. Creatures with strange abilities, bizarre anatomies, and/or alien mindsets. Which include Lovecraftian-like aberrations like the Illithids, the Aboleths, and the Beholders.