knife edge knife colter • knife-edge · · · Info · Definitions · Synonyms · Characters · · knife edge · · Text Common · · Latin · · Scripts 10 · · Length 2 · · Syllables Definitions · · · (noun) the sharp cutting side of the blade of a knife. Synonyms: knife edge, cutting edge. · · Noun Definition 1 (noun) a narrow boundary. Synonyms: knife-edge. Example: "He lived on a knife-edge between genius and insanity." · · Noun Definition 1 Synonyms · · · cutting edge · · Synonym 1 Characters · · space U+0020 d latin small letter d U+0064 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 k latin small letter k U+006B n latin small letter n U+006E