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Definition of Y noun from the Oxford Advanced Learner's Dictionary

Y

noun
 
/waɪ/
 
/waɪ/
(also y)
(plural Ys, Y’s, y’s
 
/waɪz/
 
/waɪz/
)
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  1. [countable, uncountable] the 25th letter of the English alphabet
    • ‘Year’ begins with (a) Y/‘Y’.
  2. [uncountable] (mathematics) used to represent a number whose value is not mentioned
    • Can the value of y be predicted from the value of x?
  3. [uncountable] a person, a number, an influence, etc. that is not known or not named
    • Let's suppose X knows what Y is doing.
  4. see also Y chromosome, Y-Fronts™
See Y in the Oxford Advanced American Dictionary
trait
noun
 
 
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B2
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