yellowstone yellow star-thistle • yellowstone national park · · · Info · Definitions · Characters · · yellowstone · · Text Latin · · Script 11 · · Length 3 · · Syllables Definitions · · · (noun) a tributary of the Missouri River that flows through the Yellowstone National Park. Synonyms: Yellowstone, Yellowstone River. · · Noun Definition 1 Characters · · e latin small letter e U+0065 l latin small letter l U+006C n latin small letter n U+006E 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 y latin small letter y U+0079