World War I.

An exclamation made before committing suicide, in speech, text, or in a suicide note. / (humorous) A call said before taking a stiff drink, especially a shot of vodka.

Alternative form of World War I

plural of brave new world

World War II.

Any monkey from any of the five families of primates that are found in Central America and South America: the Callitrichidae, the Cebidae, Aotidae, Pitheciidae, and Atelidae.

(physics) An interpretation of quantum mechanics that claims to resolve all the "paradoxes" of quantum theory by allowing every possible outcome to every event to define or exist in its own "history" or "world".

Laborers are encouraged to unionize or otherwise engage in collective action on a global scale in order to use the strength of their numbers to obtain better conditions.

(US) The president of the United States.

Alternative spelling of World War II