Dictionary

diphthong

noun diph·thong \ˈdif-ˌthŋ, ˈdip-\

linguistics : two vowel sounds joined in one syllable to form one speech sound

Full Definition of DIPHTHONG

1
:  a gliding monosyllabic speech sound (as the vowel combination at the end of toy) that starts at or near the articulatory position for one vowel and moves to or toward the position of another
2
:  digraph
3
:  the ligature æ or œ
diph·thon·gal \dif-ˈthŋ-(g)əl, dip-\ adjective
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Examples of DIPHTHONG

  1. The sounds of ou in out and of oy in boy are diphthongs.

Origin of DIPHTHONG

Middle English diptonge, from Middle French diptongue, from Late Latin dipthongus, from Greek diphthongos, from di- + phthongos voice, sound
First Known Use: 15th century

Other Grammar and Linguistics Terms

ablaut, allusion, anacoluthon, diacritic, gerund, idiom, infinitive, metaphor, semiotics, simile
DIPHTHONG Defined for Kids

diphthong

noun diph·thong \ˈdif-ˌthŋ, ˈdip-\

Definition of DIPHTHONG for Kids

:  two vowel sounds joined in one syllable to form one speech sound <The sounds of “ou” in “out” and of “oy” in “boy” are diphthongs.>
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