(1):
(a.) Last in a train of progression or consequences; tended toward by all that precedes; arrived at, as the last result; final.
(2):
(a.) Incapable of further analysis; incapable of further division or separation; constituent; elemental; as, an ultimate constituent of matter.
(3):
(a.) Farthest; most remote in space or time; extreme; last; final.
(4):
(v. t. & i.) To come or bring to an end; to eventuate; to end.
(5):
(v. t. & i.) To come or bring into use or practice.