Definition of deathwatch

• n. - 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.
• n. - A small wingless insect, of the family Psocidae, which makes a similar but fainter sound; -- called also deathtick.
• n. - The guard set over a criminal before his execution.