dead march

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A slow, solemn funeral march.

from The Century Dictionary.

• noun A piece of solemn music played in funeral processions, especially at military funerals: as, the dead-march in Handel's oratorio of Saul.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a slow march to be played for funeral processions