There are 3 definitions of X in English:

X1

Syllabification: X
(also x)

noun (plural Xs or X's)

  • 1The twenty-fourth letter of the alphabet.
    More example sentences
    • X is the 24th letter of the alphabet and it's got me stumped.
    • The Latin X came from Chi, a letter invented by the Greeks who used it to represent the sound ks in the Western part of the country.
  • 1.1Denoting the next after W in a set of items, categories, etc..
    More example sentences
    • You give the variable operand one of the 4 names #W, #X, #Y, or #Z.
    • A participant may answer a multiple-choice question with either the letter answer (W, X, Y or Z) or the verbal answer; however, if the verbal answer is given, it must be exactly as indicated in the question.
  • 1.2Denoting an unknown or unspecified person or thing: there is nothing in the data to tell us whether X causes Y or Y causes X
    More example sentences
    • Discover how 'Mr X' built an online business making over $100,000 a month (mostly profit) in just 16 weeks.
    • A greater number of fresh vegetables are sold in City X than in City Y.
    • Regarding Mr. X's remarks about the Directorate of Operations' "pitiful management": I did describe in my article the problem of upwardly mobile mediocrity, but Mr. X is right to fault me for not hammering home the point.
  • 1.3 (x) (Used in describing play in bridge) denoting an unspecified card other than an honor.
    More example sentences
    • In this case we are comparing the chances of East having J-10-x, J-x, or 10-x.
    • If your doubleton suit is in the form of: K Q, K J, Q J, Q x, J x don't count both honor and Shape points.
  • 1.4 (usually x) The first unknown quantity in an algebraic expression, usually the independent variable.
    [the introduction of x, y, and z as symbols of unknown quantities is due to Descartes (Géométrie, 1637), who took z as the first unknown and then proceeded backward in the alphabet]
    More example sentences
    • We express a relationship between two variables, which we will refer to as x and y, by stating the following: The value of the variable y depends upon the value of the variable x.
    • For the quadratic function y=X^ - 9, determine the values of X such that y>or equal to 7.
  • 1.5 (usually x) Denoting the principal or horizontal axis in a system of coordinates.
    More example sentences
    • When displaying two variables in a time domain plot, the X-axis is labeled with units of time.
    • Click on the Options tab; then choose XY Plot and select the signal to be used for X coordinate generation in the X-Axis box.
  • 2A cross-shaped written symbol, in particular.
  • 2.1Used to indicate a position on a map or diagram.
    More example sentences
    • In Sweden, X is used by the armed forces on maps to denote that blasting or other type of destruction has been prepared.
    • If you happen to camp just North of the straight trail section, the only way to accurately place the X on the map is to use a GPS.
    • The students are to use the map to find the sites marked with an X.
  • 2.2Used to indicate a mistake or incorrect answer.
    More example sentences
    • Mark incorrect responses with an X.
    • I put a check next to correct problems and an X by incorrect problems.
  • 2.3Used in a letter or message to symbolize a kiss.
    More example sentences
    • Have a lovely day! xxxxx
    • Take care, love, Raffa xxx
  • 2.4Used to indicate one’s vote on a paper ballot.
    More example sentences
    • In order to vote you simply put an 'X' next to the name of the candidate you support.
    • Voters mark an 'X' in the first column for their first choice and a second 'X' in the second column for their other choice.
  • 2.5Used in place of the signature of a person who cannot write.
    More example sentences
    • When a person is physically unable to sign his or her name on the voter registration form, he or she may mark an X or take an oath swearing to the statement on the form.
    • In many jurisdictions testators may authenticate their last will and testament with the letter X
    • In other states the law requires courts to invalidate wills that are signed with an X unless the testator was physically or mentally incapable of signing her full name.
  • 3A shape like that of a letter X: two wires in the form of an X [in combination]: an X-shaped cross
    More example sentences
    • The design of the Exofit safety harness uses a single piece of material constructed in the shape of an "X" that wraps around the worker.
    • These conditions are normally very difficult to achieve, but we can reproduce these conditions by using two (or more) fine wires arranged so that they cross and touch at a single point, in the form of an X, as the load of a pulsed power generator.
    • As a compromise, management marked each of the Idles' hands with a large black "X" as a warning to the club's staff not to serve alcohol to the band.
  • 4The Roman numeral for ten.
    More example sentences
    • So XXXI is 31, and XXIV is 24.
    • IX means to subtract I from X, leaving 9.
    • These inscriptions allow us to demonstrate the presence of seven cohorts of the legion, either in whole or part, building on Hadrian's Wall: cohorts I, II, III, VI, VII, VIII and X.

verb (X's, X'ing, X'd)

[with object] Back to top  
  • 1Mark or make a sign with an X.
    More example sentences
    • Another day X'ed on my calender.
    • Try yellow highlighter X'd on the inside window as one big X or several little X's.
  • 1.1Overwrite or obliterate with an X or series of X’s.
    More example sentences
    • There are hand-written notes and corrections, done in pencil; in some places whole blocks of text are stricken out, x'd over with a typewriter or opaqued with red crayon.
    • Also can he go to court and say that the XXX'd over paragraphs are still valid?
  • 1.2Make void or annul; invalidate: we’re all X-ing things out of our curricula
    More example sentences
    • Uh, I found more but then accidentally Xed out the page and I'm too lazy to bring it back up.
    • X is for X-ing out accidents in your home.
    • We're talking about a savings of some $20 million per year alone just by x-ing out this non-essential department completely.

More definitions of X

Definition of X in:

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody

There are 3 definitions of X in English:

X2

Syllabification: X

symbol

  • 1A rating assigned to movies classified as suitable for adults only. Replaced in 1990 by NC-17.

More definitions of X

Definition of X in:

There are 3 definitions of X in English:

X3

Line breaks: X

Entry from British & World English dictionary

abbreviation

North American informal
  • The drug Ecstasy.

More definitions of X

Definition of X in: