Overview of Function Security. Function security is the mechanism by which user access to applications functionality is controlled. Oracle Applications GUI-based architecture aggregates several related business functions into a single form.
The US nickel has been 21.2 mm in diameter ever since 1883.
Definition of nickel. 1  1 : a silver-white hard malleable ductile metallic element capable of a high polish and resistant to corrosion that is used chiefly in alloys and as a catalyst â see element table. 2  2a (1) : the U.S. 5-cent piece regularly containing 25 percent nickel and 75 percent copper (2) : the Canadian 5-cent pieceb : five cents.