flat knot flat-knit • flatland · · · Info · Definitions · Synonyms · Characters · · flat knot · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) a square knot used in a reef line. Synonyms: reef knot, flat knot. · · Noun Definition 1 Synonyms · · · reef knot · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 f latin small letter f U+0066 k latin small letter k U+006B l latin small letter l U+006C n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074