To strike; knock.
To toll, as a bell; ring for or at a funeral; knoll.
To summon by or as if by a knell.
To sound, as a bell, especially as a funeral bell.
Hence To sound as an omen or a warning of coming evil.
noun.
The sound caused by striking a bell; especially, the sound of a bell rung with solemn slowness at or for a funeral; a passing-bell.