'Horn' in the Bible

I have sewed sackcloth upon my skin, and defiled my horn in the dust.

With roar and rage {it races over the ground}, and it cannot stand still at [the] sound of [the] horn.

{Whenever} a horn [sounds], it says, 'Aha!' And it smells [the] battle from a distance-- [the] thunder of [the] commanders and [the] war cry.