hash mark hashmark • hash out · · · Info · Definitions · Synonyms · Characters · · hash mark · · Text Common · · Latin · · Scripts 9 · · Length 2 · · Syllables Definitions · · · (noun) an insignia worn to indicate years of service. Synonyms: service stripe, hashmark, hash mark. · · Noun Definition 1 Synonyms · · · service stripe · · Synonym 1 hashmark · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 h latin small letter h U+0068 k latin small letter k U+006B m latin small letter m U+006D r latin small letter r U+0072 s latin small letter s U+0073