1. 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. Ystem> 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. 4. A one-dimensional arraY. (1996-09-30)