The Collaborative International Dictionary of English v.0.48:

Golgotha \Gol"go*tha\, n.
   Calvary. See the Note under Calvary.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Golgotha
    n 1: a hill near Jerusalem where Jesus was crucified [syn:
         Calvary, Golgotha]

Easton's 1897 Bible Dictionary:

Golgotha
   the common name of the spot where Jesus was crucified. It is
   interpreted by the evangelists as meaning "the place of a skull"
   (Matt. 27:33; Mark 15:22; John 19:17). This name represents in
   Greek letters the Aramaic word Gulgaltha, which is the Hebrew
   Gulgoleth (Num. 1:2; 1 Chr. 23:3, 24; 2 Kings 9:35), meaning "a
   skull." It is identical with the word Calvary (q.v.). It was a
   little knoll rounded like a bare skull. It is obvious from the
   evangelists that it was some well-known spot outside the gate
   (comp. Heb. 13:12), and near the city (Luke 23:26), containing a
   "garden" (John 19:41), and on a thoroughfare leading into the
   country. Hence it is an untenable idea that it is embraced
   within the present "Church of the Holy Sepulchre." The hillock
   above Jeremiah's Grotto, to the north of the city, is in all
   probability the true site of Calvary. The skull-like appearance
   of the rock in the southern precipice of the hillock is very
   remarkable.


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

Golgotha, a heap of skulls; something skull-shaped