serial killer serial • serial monogamy · · · Info · Definitions · Synonyms · Characters · · serial killer · · Text Common · · Latin · · Scripts 13 · · Length 4 · · Syllables Definitions · · · (noun) someone who murders more than three victims one at a time in a relatively short interval. Synonyms: serial killer, serial murderer. · · Noun Definition 1 Synonyms · · · serial murderer · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B l latin small letter l U+006C r latin small letter r U+0072 s latin small letter s U+0073