ultimāˈtum noun (pl ultimāˈta or ultimāˈtums)

1. Final terms
2. A last offer or demand
3. A last word
4. A final point
5. Something fundamental

ulˈtimo adjective

In the last (month) (abbrev ult. or ulto.)

ultimogeniture /-jenˈ/ noun (law)

Succession of the youngest, as in borough-English (qv), opp to primogeniture

ultimate fighting noun

A competitive sport in which two opponents fight each other without protective gear, subject to only minimal rules on the types of blow permissible (also called extreme fighting)

ultimate load noun (aeronautics)

The maximum load that a structure is designed to withstand without a failure

ultimate tensile stress noun (engineering)

The highest load applied to a metal in the course of a tensile test, divided by the original cross-sectional area

the ultimate deterrent

Nuclear weapons