Meaning of X, x

X

Pronunciation: (eks), [key]
— pl. X's Xs, x's xs.
  1. the 24th letter of the English alphabet, a consonant.
  2. any spoken sound or combination of sounds represented by the letter X or x, as in xylene, box, or exact.
  3. something having the shape of an
  4. a written or printed representation of the letter X or x.
  5. a device, as a printer's type, for reproducing the letter X or x.

x

Pronunciation: (eks), [key]
— x-ed x'd x-ing x'ing
  1. to cross out or mark with or as if with an x (often fol. by out): to x out an error.
  2. to indicate choice, as on a ballot or examination (often fol. by in): to x in the candidate of your choice.

X

Pronunciation: [key]
  1. experimental.
  2. extra.
  3. extraordinary.

X

Pronunciation: [key]
— Symbol.
  1. the 24th in order or in a series, or, when I is omitted, the 23rd.
  2. (sometimes l.c.) the Roman numeral for 10. Cf.
  3. Christ.
  4. Christian.
  5. cross.
  6. reactance.
  7. a ten-dollar bill.
  8. (in the U.S.) a rating of the Motion Picture Association of America for movies with subject matter that is suitable for adults only: persons who are under age (usually 17) will not be admitted. Cf.(def. 7),(def. 5).
  9. (in Great Britain) a designation for a film recommended for adults only. Cf.(def. 11),(def. 5),(def. 5).
  10. a person, thing, agency, factor, etc., of unknown identity.
  11. (formerly) xenon.

x

Pronunciation: [key]
  1. ex (def. 1).
  2. excess.
    1. (of stock trading) ex dividend.
    2. (of bond trading) Seeex interest.
  3. experimental.
  4. extra.

x

Pronunciation: [key]
— Symbol.
  1. an unknown quantity or a variable.
  2. (used at the end of letters, telegrams, etc., to indicate a kiss.)
  3. (used to indicate multiplication) times: 8 × 8=64.
  4. (used between figures indicating dimensions) by:(read: “three by four inches”); 3″ × 4″ × 5″ (read: “three by four by five inches”). 3″ × 4″
  5. power of magnification: a 50x telescope.
  6. (used as a signature by an illiterate person.)
  7. cross.
  8. crossed with.
  9. (used to indicate a particular place or point on a map or diagram.)
  10. out of; foaled by: a colt by Flag-a-way x Merrylegs.
  11. (used to indicate choice, as on a ballot, examination, etc.)
  12. (used to indicate an error or incorrect answer, as on a test.)
  13. (in Cartesian coordinates) the x-axis.
  14. captures.
  15. a person, thing, agency, factor, etc., of unknown identity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.