As a noun caliph
is the political leader of the muslim world, successor of muhammad's political authority, not religious or spiritual.
As an adjective undefined is
lacking a definition or value.
* calif, kalif, kaliph, khalif, khalifa
The political leader of the Muslim world, successor of Muhammad's political authority, not religious or spiritual.
- Ahmadis call their Caliph the Khalifatul Masih .
Lacking a definition or value.
(mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
- The result of division by zero is undefined .