A handwritten letter from the British Prime Minister to the commanding officers of nuclear submarines, specifying the action to be taken in the event that an enemy nuclear strike destroys the British government.

die / (uncommon) be defeated

plural of letter of last resort

(chiefly Western US, historical) A saloon located at the end of a road or the outskirts of a town.

(of a black hole) Synonym of photon sphere

(literary) At the point when one about to die.

(video games) A multiplayer deathmatch gameplay mode in which the last surviving player is the winner.

(dated) To complete; to put the finishing touch to.

(law) A doctrine of statutory interpretation according to which qualifying phrases attach and refer to only the last antecedent.

Alternative form of last time I checked