Definition of world war
: a war engaged in by all or most of the principal nations of the world
especially, capitalized both Ws
: either of two such wars of the first half of the 20th century
Test Your Vocabulary
Which Word Does Not Belong?
-
- Which of these words does not mean "nonsense"?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share world war
Time Traveler for world war
The first known use of world war was in 1848
See more words from the same year