The Hadith narrated by only one narrator in a certain generation. If that narrator is a Sahabi (Companion) or Tabi‘i (Follower), it is called "Ghareeb Mutlaq" (Absolute Ghareeb), and if the narrator is someone else, it is called "Ghareeb Nisbi" (Relative Ghareeb).

Note SR: ER Among the above types, Mutawatir Hadith is true to the level of certain knowledge (Ilm al-Yaqin). Other types can be acceptable or rejected.

Another definition of Ghareeb Hadith: Ghareeb Hadith is one in which only one narrator remains in any generation of the chain (Sanad).

Warning: Usually people consider Ghareeb narration weak, but this is not true; Ghareeb narrations can be authentic or weak.