the 24th letter of the English alphabet
a written character or design denoting this letter
the sound represented by this letter, one of the English consonants
an item designated as X, esp the 24th in a series
the Roman numeral for ten
used to represent the first unknown quantity in an algebraic equation or expression
used to designate the horizontal axis in a plane coordinate system
somebody or something whose identity is unknown or withheld
used in place of a signature by somebody who cannot write
used to indicate a choice on a ballot paper
used to symbolize a kiss on a letter or card
used to indicate a mistake, e.g. when marking written work