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Meaning of umlaut

um•laut

Pronunciation: (oom'lout), [key]
— Ling. Ling.
—n.
  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. Cf.
  2. (in Germanic languages) assimilation in which a vowel is influenced by a following vowel or semivowel; apophony.
—v.t.
  1. to modify by umlaut.
  2. to write an umlaut over.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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