サイエンスフィクションサイエンスフィクションMeanings1nounscience fiction; sci-fiLoanword from English; often abbreviated as SF (エスエフ). Used for the genre in literature, film, etc.See also: SF彼かれはサイエンスフィクションの小しょう説せつをよく読よむ。He often reads science fiction novels.