science fiction

noun

: fiction dealing principally with the impact of actual or imagined science on society or individuals or having a scientific factor as an essential orienting component

science-fictional

ˈsī-ən(t)s-ˈfik-sh(ə-)nəl 

adjective

Examples of science fiction in a Sentence

Time travel exists only in the realm of science fiction.

Recent Examples on the Web

Then, in 2000, Stewart took on another clutch role in science fiction, Professor Charles Xavier in Bryan Singer’s version of X-Men. — Jordan Hoffman, Vanity Fair, 29 Oct. 2026

John Scalzi has developed a reputation in science fiction for comitting to the bit. — Sam MacDonald, Scientific American, 28 Oct. 2026

Some scientists and science fiction authors envisioned a world in which doctors could diagnose patients remotely and one person could beam their skills and talents directly into the bodies of others. — The Editors, JSTOR Daily, 28 Oct. 2026

But many companies have been racing to develop vehicles straight out of science fiction movies and cartoons, with a few already selling aircraft. — Chris Isidore, CNN Money, 25 Oct. 2026

Word History

First Known Use

1898, in the meaning defined above

Rhymes for science fiction

• antifriction
• benediction
• contradiction
• crucifixion
• dereliction
• interdiction
• jurisdiction
• malediction
• addiction
• affliction
• constriction
• conviction

Kids Definition

science fiction

noun

: fiction that deals with the influence of real or imagined science on society or individuals

science-fictional

ˈsī-ən(t)s-ˈfik-shnəl, 

-shən-ᵊl

adjective