1. Plural of ablaut; a systematic variation in the vowel sound of a word root or stem, used to mark grammatical distinctions (such as tense or number) in Germanic languages.
Usage: linguistics; also called vowel gradation

Examples

• In English, ablauts appear in irregular verbs like sing, sang, sung.
• German ablauts follow predictable patterns across many verb conjugations.
• The study of ablauts helps linguists understand the historical development of Indo-European languages.
• Ablauts are a key feature distinguishing strong verbs from weak verbs in Germanic languages.
• Students of historical linguistics learn to recognize ablauts in ancient texts.