Y
Y [Y] noun, abbreviation BrE [waɪ] NAmE [waɪ] noun (also y)(pl. Ys, Y's, y'sBrE [waɪz] ; NAmE [waɪz] ) 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. see also ↑Y chromosome, Y-fronts abbreviation the Y (NAmE, informal) ↑YMCA ↑YWCA symbol the symbol for the chemical element ↑yttrium
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