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a. A change in a vowel sound caused by partial assimilation especially to a vowel or semivowel occurring in the following syllable.
b. A vowel sound changed in this manner. Also called vowel mutation.
2. The diacritic mark (¨) placed over a vowel to indicate an umlaut, especially in German.
tr.v. um·laut·ed, um·laut·ing, um·lauts
1. To modify by umlaut.
2. To write or print (a vowel) with an umlaut.
1. (Phonetics & Phonology) the mark (¨) placed over a vowel in some languages, such as German, indicating modification in the quality of the vowel. Compare diaeresis
2. (Phonetics & Phonology) (esp in Germanic languages) the change of a vowel within a word brought about by the assimilating influence of a vowel or semivowel in a preceding or following syllable
[C19: German, from um around (in the sense of changing places) + Laut sound]
1. a mark (¨) used as a diacritic over a vowel, as ä, ö, ü, to indicate a vowel sound different from that of the letter without the diacritic, esp. as so used in German. Compare dieresis.
2. (in Germanic languages) assimilation in which a vowel is influenced by a following vowel or semivowel.v.t.
3. to modify by umlaut.
4. to write an umlaut over.
[1835–45; < German]
A punctuation mark (¨) used in German over a vowel to show that its pronunciation is modified.