patterned change of base vowels in forms of a word or in related words to show changes in tense, meaning, etc., as in the Indo-European languages (Ex.: drink, drank, drunk)
Origin of ablautGerman ; from ab-, off, from + laut, sound: see loud
A vowel change, characteristic of Indo-European languages, that accompanies a change in grammatical function; for example, i, a, u in sing, sang, sung. Also called apophony, gradation.
Origin of ablautGerman : ab, off (from Middle High German ab, abe, from Old High German aba; see apo- in Indo-European roots) + Laut, sound (from Middle High German l&umacron;t, from Old High German hl&umacron;t; see kleu- in Indo-European roots).
(third-person singular simple present ablauts, present participle ablauting, simple past and past participle ablauted)
- (intransitive, linguistics, of a vowel-containing linguistic component) To undergo a change of vowel.
- (linguistics) To cause to change a vowel.