'Horn' in the Bible

And there let Zadok the priest and Nathan the prophet put the holy oil on him to make him king over Israel; and sounding the horn say, Long life to King Solomon!

And Zadok the priest took the vessel of oil out of the Tent, and put the holy oil on Solomon. And when the horn was sounded, all the people said, Long life to King Solomon!

And it came to the ears of Adonijah and all the guests who were with him, when their meal was ended. And Joab, hearing the sound of the horn, said, What is the reason of this noise as if the town was worked up?