running light running knot • runningly · · · Info · Definitions · Synonyms · Characters · · running light · · Text Common · · Latin · · Scripts 13 · · Length 3 · · Syllables Definitions · · · (noun) light carried by a boat that indicates the boat's direction; vessels at night carry a red light on the port bow and a green light on the starboard bow. Synonyms: sidelight, running light. · · Noun Definition 1 Synonyms · · · sidelight · · Synonym 1 Characters · · space U+0020 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 l latin small letter l U+006C n latin small letter n U+006E r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075