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Diphthong vs Undefined - What's the difference?

diphthong | undefined |

As a noun diphthong

is diphthong.

As an adjective undefined is

lacking a definition or value.

diphthong

English

(wikipedia diphthong)

Noun

(en noun)
  • (phonetics) A complex vowel sound that begins with the sound of one vowel and ends with the sound of another vowel, in the same syllable.
    • For example: "ae", "au", "ou"
  • (rare) A vowel digraph or ligature.
  • * 1854 , Robert Bigsby, Historical and Topographical Description of Repton, in the County of Derby , Woodfall and Kinder, page 47:
    • And he might have written the name, also, with the diphthong æ, as well as the single vowel, in the initial syllable, throughout all the preceding forms.
  • * 1860 , Joseph E. Worcester, An Elementary Dictionary of the English Language , A New Edition, Swan, Brewer, and Tileston (publishers), page 12:
    • An improper diphthong has only one of the vowels sounded; as, ea'' in ''heat'', ''oa'' in ''coal .
  • * 1874 , Theophilus Dwight Hall, A Child’s First Latin Book , John Murray (publisher), page 3:
    • The diphthong ae'' is sounded like ''?'' (§7); that is, it has the sound of ''ey'' in ''they .

    Derived terms

    * diphthongal * diphthongize * diphthongization * diphthongoid

    Related terms

    * monophthong * triphthong

    See also

    * glide * ligature

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined