an unselective and microscopically thorough comparison between two versions of something; comes from the Unix "diff" utility, which gives a list of all the differences between two files.
by master_gopher January 17, 2006
A more definite form of under than just "under", and further beneath than "beneath" ... therefore, "Underbeneath".
"underbeneath the table..."
by master_gopher January 17, 2005