umlaut umiri • ump · · · Info · Definitions · Synonyms · Characters · · umlaut · · Text Latin · · Script 6 · · Length Definitions · · · (noun) a diacritical mark (two dots) placed over a vowel in German to indicate a change in sound. Synonyms: dieresis, diaeresis. · · Noun Definition 1 Synonyms · · · dieresis · · Synonym 1 diaeresis · · Synonym 2 Characters · · a latin small letter a U+0061 l latin small letter l U+006C m latin small letter m U+006D t latin small letter t U+0074 u latin small letter u U+0075