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X: noun – 24th letter of the English alphabet & 21st of ancient Roman, the letter, its sound; the shape of the letter; a diagonal cross marking a point on a map; incorrect; to place a vote; indicate a kiss; signature of someone who can't write; Roman numeral for ten; an unknown or variable quantity in maths; an unknown or unspecified person, thing or number; a quantity measured along a horizontal axis in a graph; sex chromosome associate with the female; a special quality or talent; of films, those suitable for adults; Ecstasy, the drug. Shorthand for Christ, as in Xtian – Christian, Christmas - Xmas.
'Long John Silver, so called due his short stature, told Inspector Barnaby that the treasure he sought was hidden at the point marked with an 'x' on the map he'd stolen from the criminal, Bluebeard.'
'Jane kissed the Valentine card and sealed it, writing an 'x' along the seal for each year she'd known and desired Kevin.'
'When George put the 'x' on the form, he thought he was gaining permission to watch an x rated film, but it turned out to be a serious documentary concerning the x chromosome and it went way over his head.'