Y Meaning of Y in English I Y, y name of letter BrE AmE waɪ▷ Y's, y's, Ys waɪz —Communications code name: Yoke▶ ˈ Y ˌ chromosome BrE AmE II Y, y in Welsh expressions BrE AmE ə Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012