Possible Definitions:
1. Ultimate (a.) Farthest; most remote in space or time; extreme; last; final.
2. Ultimate (a.) Last in a train of progression or consequences; tended toward by all that precedes; arrived at, as the last result; final.
3. Ultimate (a.) Incapable of further analysis; incapable of further division or separation; constituent; elemental; as, an ultimate constituent of matter.