Definition/Meaning of X

• English - Numeral: X An unknown quantity or unknown value. Let X represent the forecast traffic flow in 20 years’ time.
• English - Proper noun: X A placeholder for an unknown, suppressed or hypothetical name. Suppose that Mr and Mrs X have been married for many years. The woman known until now as Witness X has been unmasked after a court ruling. A surname , used by those who have had their identity or heritage, including their proper ancestral names, erased or forgotten. Malcolm X An online social media network , formerly known as…
• English - Letter: X (letter, uppercase) The twenty-fourth letter of the English alphabet , called ex and written in the Latin script.
• English - Noun: X Any mark that looks like that letter, such as a mark made by a person who cannot read or write in lieu of a signature . The spot behind the goal . X (uncountable) (slang, uncountable) Ecstasy , a particular street drug . 2003 January 7, “In da Club” (track 5), in Get Rich or Die Tryin', performed by 50 Cent: You can find me in the club, bottle full of bub'. Look, mami, I got the X if you into…
• English - Adjective: X (not comparable) (not comparable) Intersex or non-binary (in passports and identification documents). 2019 May 29, Amy Harmon, “Which Box Do You Check? Some States Are Offering a Nonbinary Option”, in The New York Times, archived from the original on 08 Jun 2019: So last summer, when the Massachusetts State Legislature became one of the first in the nation to consider a bill to add an “ X ”…