One of the mysteries of the English language finally explained.
Definition of absolute idealism in English:
absolute idealism
noun
1Any of various views according to which the only true reality is the Absolute and that the objects of human knowledge are ideas of a universal mind or forms in which the Absolute manifests itself (now chiefly historical).
2(More generally) any of various other forms of idealism which do not suppose an independent reality underlying our ideas of external objects.
Origin
Early 19th century. After German absoluter Idealismus.