1. Meinongianism: Basic principles, motivations and brief history; 2. Logical issues raised by basic Meinongian principles; 3. Interpretations of the quantifier "x"; 4. Meinongianism extended and refined; 5. Neo-Meinongianism; References.

"Meinongianism (named after Alexius Meinong) is, roughly, the view that there are not only existent but also nonexistent objects. In this Element, Meinong's so-called object theory as well as "neo-Meinongian" reconstructions are presented and discussed, especially with respect to logical issues, both from a historical and a systematic perspective"--