(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)