1. < mathematics > A member of a vector space .
2. A line or movement defined by its end points, or by the current position and one other point. See vector graphics .
3. A memory location containing the address of some code, often some kind of exception handler or other operating system service. By changing the vector to point to a different piece of code it is possible to modify the behaviour of the operating system.
Compare hook .
A one-dimensional array .