I have found that at least two English dictionaries have a separate and unique definition for one word just for how it was used in the KJV. All sources including KJV-only sources seem to agree that the sackbut was a wind musical instrument. The Oxford English Dictionary noted that the name sackbut was “not found as the name of a musical instrument earlier than the later half of the 15th century” (XIV, p. 333). The 1828 Webster’s Dictionary described the sackbut as “a wind instrument of music; a kind of trumpet.“ Laurence Vance acknowledged that “a sackbut is a medieval wind instrument” (Archaic Words, p. 296). D. A. Waite’s Defined KJB defined “sackbut” as “a medieval wind instrument, forerunner of the trombone” (p. 1170). James Knox wrote: “A sackbut is a brass wind instrument of music, like a trumpet, so contrived that it can be lengthened or shortened according to the tone required” (By Definition, p. 142). John Florio’s 1598 A World of Words is said to explain trombone as “a great sackbut, a great trump.“ The Interpreter’s Dictionary of the Bible contended that “the sackbut was some kind of trombone, which did not exist in biblical times” (Vol. III, p. 476). On the other hand, most sources affirm that the word in the original languages at Daniel 3:5 that was translated "sackbut" in the KJV referred to a stringed musical instrument. That sets a little background for the special definition for "sackbut" that I found in two English dictionaries. The 1970 Webster’s New Twentieth Century Dictionary of the English Language (Unabridged) gives two different definitions for sackbut. Its first definition is “a medieval wind instrument, similar to the trombone.” Its second definition is as follows: “In the Bible, a musical stringed instrument resembling a lyre; Daniel 3:5” (p. 1593). This dictionary stated that this word “has acquired its second meaning from somewhat resembling in form Hebrew sabbeca, and being used to translate it” (Ibid.). Perhaps from the influence of that dictionary or some other possible common source, the 1976 Funk & Wagnalls Standard Desk Dictionary also listed a second definition as follows: “In the Bible, a stringed instrument” (II, p. 587).