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Y, or y, is the twenty-fifth and penultimate letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide.

Y definition: the 25th letter of the English alphabet, a semivowel. See examples of Y used in a sentence.

Word origin C14: from Scottish -ie, -y, familiar suffix occurring originally in names, as in Jamie (James)

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Jan 27, 2026 · This letter always represents the IPA vowel /y/, never the consonant /j/ that y sometimes represents in modern English. Old English texts often include a tittle above the letter: ẏ

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The most common diminutives are formed with the prefix mini- and with suffixes such as -let and -y. We often use a diminutive with names or with abbreviated names when we want to be more informal, or …

Definition of Y noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.