- (linguistics) An assimilatory process whereby a vowel is pronounced more like a following vocoid that is separated by one or more consonants.
- (orthography) The diacritical mark ( ¨ ) placed over a vowel, usually when it indicates such assimilation.
- (linguistics) A vowel so assimilated.
- (linguistics) The umlaut process (as above) that occurred historically in Germanic languages whereby back vowels became front vowels when followed by syllable containing a front vocoid (e.g. Germanic lūsiz > Old English lȳs(i) > Modern English lice).
- (linguistics, transitive) To modify (a word) so that an umlaut is required in it.
"an umlauting vowel"
- (transitive) To place an umlaut over (a vowel).