Noun
A small beetle (Anobium tessellatum and other allied species). By forcibly striking its head against woodwork it makes a ticking sound, which is a call of the sexes to each other, but has been imagined by superstitious people to presage death.
A small wingless insect, of the family Psocidae, which makes a similar but fainter sound; -- called also deathtick.
The guard set over a criminal before his execution.
Source: Webster's dictionaryThe last day of the deathwatch dawns gray and melancholy. Source: Internet
By Saturday, it is beginning to seem like a deathwatch on the Charles. Source: Internet