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  1. X

    • IPA[ɛks]


    • n.
      the twenty-fourth letter of the alphabet.;denoting the next after W in a set of items, categories, etc.
    • noun: X, plural noun: X's

    • 釋義


    • 1. the twenty-fourth letter of the alphabet.
    • denoting the next after W in a set of items, categories, etc.
    • denoting an unknown or unspecified person or thing there is nothing in the data to tell us whether X causes Y or Y causes X
    • (in describing play in bridge) denoting an unspecified card other than an honour East knows that declarer cannot hold a doubleton Qx
    • the first unknown quantity in an algebraic expression, usually the independent variable.
    • denoting the principal or horizontal axis in a system of coordinates the
    • 2. a shape like that of a letter X two wires in the form of an X an X-shaped cross
    • 3. a cross-shaped written symbol.
    • used to indicate a position on a map or diagram put an X on the spot where you think its eye should be
    • used to indicate a mistake or incorrect answer.
    • used in a letter or message to symbolize a kiss.
    • used to indicate one's vote on a ballot paper with trembling hand you inscribe your X on the slip of paper
    • used in place of the signature of a person who cannot write nearly all those engaged in the fur trade signed with an X
    • 4. the Roman numeral for ten.