monody

noun4

1. •
   An ode, as in Greek drama, for a single voice, often specifically a mournful song or dirge.
2. •
   Any poem mourning the death of someone; an elegy.
3. •
   A composition having a single melodic line.

   • All directions in life were blocked to him. He could not think, he could not sleep, his heart thudded to a deadening monody of fear. Fear that is itself the penalty of all things feared. — 1938
4. •
   A monotonous or mournful noise.

   • Stroke by stroke, the great familiar monody of that incomparable curfew rose and fell in the stillness. — 1911