X, xɛks(n.)(pl.)Xs; X's, xs; x's.

1. the 24th letter of the English alphabet, a consonant.

   Category: Language/Linguistics

2. any spoken sound represented by this letter.

   Category: Language/Linguistics

3. something shaped like anX.

4. a written or printed representation of the letter X or

   x.

xɛks; ɛkst; ˈɛk sɪŋ(v.t.)x-ed; x'd; x-ing; x'ing

1. to cross out or mark 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.

Origin of x:

1840–50

X

1. experimental.

2. extra.

3. Slang.

   Category: Pharmacology, Informal

   Ref: ecstasy (def. 5). 5

X^*

1. the 24th in order or in a series.

   Category: Math

2. (sometimes l.c.) the Roman numeral for 10.

   Ref: Compare Roman numerals.

3. Christ.

   Category: Religion

4. Christian.

   Category: Religion

5. cross.

6. reactance.

   Category: Electricity and Magnetism

7. a motion-picture rating applied to sexually graphic or explicit films. (formerly) such a rating advising that persons under the age of 17 would not be admitted to the film.

   Category: Showbiz

   Ref: Compare G (def. 2), 3 5 NC-17, PG, 2 PG-13, 3 R (def. 4). 3 5

8. a person, thing, agency, factor, etc., of unknown identity.

9. Chem.(formerly) xenon.

   Category: Chemistry

^* Symbol..

x

1. Ref: ex1 (def. 1). 1 1 1

2. experimental.

3. extra.

x^*

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 x 8 = 64.

4. (used between figures indicating dimensions) by: 3〃x 4〃 (read: “three inches by four inches”).

5. power of magnification:

   a 50x telescope.

6. (used as a signature by an illiterate person.)

7. cross.

8. (used to indicate a particular place or point on a map or diagram.)

9. (used to indicate choice, as on a ballot or examination.)

10. (used to indicate an error or incorrect answer, as on a test.)

11. a person or thing of unknown identity.

^* Symbol..