In the PC, one of 256 pointers that reside in the first 1KB of memory. Each vector points to a routine in the BIOS or elsewhere in memory, which handles the interrupt.
"interrupt vector." YourDictionary, n.d. Web. 17 August 2018. <http://www.yourdictionary.com/interrupt-vector>.
interrupt vector. (n.d.). Retrieved August 17th, 2018, from http://www.yourdictionary.com/interrupt-vector