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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.
[German : 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 lūt, from Old High German hlūt; see kleu- in Indo-European roots).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ablaut(ˈæblaʊt; German ˈaplaut)
(Linguistics) linguistics vowel gradation, esp in Indo-European languages. See gradation5
[German, coined 1819 by Jakob Grimm from ab off + Laut sound]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ab•laut(ˈɑp laʊt, ˈæb-, ˈɑb-)
(esp. in Indo-European languages) regular alternation of vowels in a word element, reflecting a change in grammatical function, as in English sing, sang, sung, song.
[1840–50; < German, =ab- off + Laut sound]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A change in the vowel in different forms of a verb, such as tenses, for example “hang” and “hung.”
Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited
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|Noun||1.||ablaut - a vowel whose quality or length is changed to indicate linguistic distinctions (such as sing sang sung song)|
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.