WordNet (r) 3.0 (2006):

Nahum
    n 1: a Hebrew minor prophet of the 7th century BC
    2: an Old Testament book telling Nahum's prophecy of the fall of
       Nineveh [syn: Nahum, Book of Nahum]

Easton's 1897 Bible Dictionary:

Nahum
   consolation, the seventh of the so-called minor prophets, an
   Elkoshite. All we know of him is recorded in the book of his
   prophecies. He was probably a native of Galilee, and after the
   deportation of the ten tribes took up his residence in
   Jerusalem. Others think that Elkosh was the name of a place on
   the east bank of the Tigris, and that Nahum dwelt there.


Hitchcock's Bible Names Dictionary (late 1800's):

Nahum, comforter; penitent