X

numeral

1. 1

   An unknown quantity or unknown value.

   Let X represent the forecast traffic flow in 20 years’ time.

proper noun

1. 1

   A placeholder for an unknown, suppressed or hypothetical name.

   The woman known until now as Witness X has been unmasked after a court ruling.

   Suppose that Mr and Mrs X have been married for many years.

2. 2

   A surname, used by those who have had their identity or heritage, including their proper ancestral names, erased or forgotten.

   Malcolm X

3. 3

   An online social media network, formerly known as Twitter.

   Two senior USAid security officials were suspended on Sunday for blocking Doge officials from a restricted area, a day after the agency’s website went offline, and Musk posted to X that USAid was “beyond repair” and needed to be shut down.

character

1. 1

   The twenty-fourth letter of the English alphabet, called ex and written in the Latin script.

noun

1. 1

   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.

2. 2

   The spot behind the goal.

adjective

1. 1

   Intersex or non-binary (in passports and identification documents).

   So last summer, when the Massachusetts State Legislature became one of the first in the nation to consider a bill to add an “X” option for nonbinary genders to the “M” and “F” on the state driver’s license, El, 17, was less surprised than some at the maneuver that effectively killed it.

verb

1. 1

   Variant of exAlternative spelling of ex (“to delete; to cross out”).

   I Xed the ballot for our Congressman last election just because he seemed […]

noun

1. 1

   slangEcstasy, a particular street drug.

   You can find me in the club, bottle full of bub'. Look, mami, I got the X if you into takin' drugs.

   Tonight the kids will go out and party down in a more righteous mode. Alcohol and not a few tabs of X will be ingested. Club music will throb through big speakers.

   I'm a love druggie falling for these drug junkies. Come n call on me besides these X parties. It's fucking hard on my body.

adjective

1. 1

   datedSuitable only for those aged sixteen or (later) eighteen years and over.

2. 2

   Obscene; adult; pornographic; XXX.

   If you go to an X movie you do so knowingly, as does everyone else in the audience. Or if the same thing comes up on TV you can switch over, or, if you wish, enjoy it in relative privacy.

proper noun

1. 1

   informalChrist

noun

1. 1

   Cross, crossing.

   Kennington via Charing X

adjective

1. 1

   Variant of extremeinformalAbbreviation of extreme.

proper noun

1. 1

   The X Window System, a windowing system for bitmap displays commonly used in Unix-like systems.

Forms

plural

Xs, X's, Xes

comparative

more X

superlative

most X

past tense

Xed

past participle

Xed

present participle

Xing

third person singular

Xs