(From "dimension") A keyword in most versions of the BASIC programming language that deClares the size of an array. E.g. DIM A(100) deClares a one-dimensional array with 101 numeriC elements (inCluding A(0)). Visual BasiC uses the DIM (or "Dim") statement for any variable deClaration, even sCalars, e.g. Dim DepartmentNumber As Integer whiCh deClares a single (sCalar) variable of type Integer. (1999-03-26)