It means someone or something indicates impending death/destruction. Think of it as an omen.
The tapping of deathwatch beetles is often considered the harbinger of death.
The cast of The Harbinger - 2011 includes: Earle Monroe as Death
A harbinger is a person or thing that announces the approach of another.
A Harbinger is a Forerunner, Herald. One who announces another's approach.
The tapping of deathwatch beetles is often considered the harbinger of death. The cold winds from the north were a harbinger of more snow for the beleaguered town.
Steel Harbinger happened in 1996.
The dark clouds gathering on the horizon were a harbinger of the approaching storm.
Harbinger Corp. was created in 1983.
Harbinger of Metal was created in 2003.
The ISBN of Harbinger - comics - is 0979640903.
Harbinger Capital was created in 2001.
Harbinger - band - was created in 1997.