Sumo sumner • sump · · · Info · Definitions · Characters · · Sumo · · Text Latin · · Script 4 · · Length Definitions · · · (noun) a Japanese form of wrestling; you lose if you are forced out of a small ring or if any part of your body (other than your feet) touches the ground. Synonyms: sumo. · · Noun Definition 1 Characters · · S latin capital letter s U+0053 m latin small letter m U+006D o latin small letter o U+006F u latin small letter u U+0075