1Chiefly with the. The father of all, the universal father; a name given to various supreme gods, especially when considered as creator or progenitor of the human race, specifically. (A title of) Odin (Woden), the supreme god and creator in Scandinavian mythology.
2Applied to God. Compare "father". Now somewhat archaic.
3(A title of) the ancient Greek god Zeus (Jupiter in Roman mythology).
Late 18th century; earliest use found in Frank Sayers (1763–1817), poet and scholar. From all + father, after Old Icelandic al-fǫðr, epithet of Odin, later also used of the Christian God.