DIM statement(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)