firth of forth firth of clyde • fir-topped · · · Info · Definitions · Characters · · firth of forth · · Text Common · · Latin · · Scripts 14 · · Length 3 · · Syllables Definitions · · · (noun) a large firth on the east coast of Scotland and the estuary of the Forth River; location of Edinburgh. Synonyms: Firth of Forth. · · Noun Definition 1 Characters · · space U+0020 f latin small letter f U+0066 h latin small letter h U+0068 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074