SFalso: エスエフFreq.FrequencyTop 5,000Meanings1nounscience fiction; sci-fi; SFCommon abbreviation for science fiction, used in the same way as the English term.彼かれはSF小説えす・えふしょうせつをよく読よむ。He often reads science fiction novels.あの映えい画がは古こ典てん的てきなSFだ。That movie is a classic sci-fi film.