Definitions for "Knell"
The stroke of a bell tolled at a funeral or at the death of a person; a death signal; a passing bell;
a warning or harbinger of, or a sound indicating, the passing away of anything; -- also called death knell.
To sound as a knell; especially, to toll at a death or funeral; hence, to sound as a warning or evil omen.
Keywords:  summon
To summon, as by a knell.