| a form of fiction that draws imaginatively on scientific knowledge and speculation in its plot, setting, theme, etc. |
| science fiction n. A literary or cinematic genre in which fantasy, typically based on speculative scientific discoveries or developments, environmental changes, space travel, or life on other planets, forms part of the plot or background. sci'ence-fic'tion (sī'əns-fĭk'shən) adj. |