future war en · NOUN
Meanings
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(uncountable) A subgenre of science fiction which involves warfare and how it might be conducted in the future.
Other late-nineteenth and early-twentieth-century novelists utilized thinly disguised Edison-surrogates in a range of future war books.
1997, Brooks Landon, Science Fiction After 1900: From the Steam Man to the Stars, New York, N.Y.: Twayne Publishers, →ISBN, page 44: