boat whistle boat train • boat-billed heron · · · Info · Definitions · Characters · · boat whistle · · Text Common · · Latin · · Scripts 12 · · Length 3 · · Syllables Definitions · · · (noun) a whistle on a boat that is sounded as a warning. Synonyms: boat whistle. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074 w latin small letter w U+0077