Death on a pale horse meaning

Pale Horse in American English a representation of Death, as in literature or the Bible. [after the Biblical pale horse on which Death rides, Rev. 6:8]

The white horse is a recurring motif in Ibsen's play Rosmersholm, making use of the common Norse folklore that its appearance was a portent of death.

Binky is a white horse owned by Death, being a living breathing creature.

[8] And I looked, and behold a pale horse: and his name that sat on him was Death, and Hell followed with him. And power was given unto them over the fourth part of the earth, to kill with sword, and with hunger, and with death, and with the beasts of the earth.