Adjacent Words

X definitions

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Webster's 1828 Dictionary

X, the twenty fourth letter of the English Alphabet, is borrowed from the Greek. In the middle and at the end of words, it has the sound of ks, as in wax, lax, luxury. At the beginning of a word, it has precisely the sound of z. It is used as an initial, in a few words borrowed from the Greek.
As a numeral, X stands for ten. It represents one V, which stands for five, placed on the top of another. When laid horizontally it stands for a thousand, and with a dash over it, it stands for ten thousand. As an abbreviation, X. Stands for Christ, and in Xn. Christian; Xm. Christmas.

WordNet (r) 3.0 (2005)

adj
1: being one more than nine [syn: ten, 10, x] n
1: the cardinal number that is the sum of nine and one; the base of the decimal system [syn: ten, 10, X, tenner, decade]
2: the 24th letter of the Roman alphabet [syn: X, x, ex]
3: street names for methylenedioxymethamphetamine [syn: Adam, ecstasy, XTC, go, disco biscuit, cristal, X, hug drug]

Merriam Webster's

adjective Date: 1950 of a motion picture of such a nature that admission is denied to persons under a specified age (as 17) — used before the adoption of NC-17

Merriam Webster's

I. noun (plural x's or xs) Usage: often capitalized, often attributive Date: before 12th century 1. a. the 24th letter of the English alphabet b. a graphic representation of this letter c. a speech counterpart of orthographic x 2. ten — see number table 3. a graphic device for reproducing the letter x 4. one designated x especially as the 24th in order or class, or the first in an order or class that includes x, y, and sometimes z 5. an unknown quantity 6. something shaped like or marked with the letter X II. transitive verb (x-ed; also x'd or xed; x-ing or x'ing) Date: circa 1849 1. to mark with an x 2. to cancel or obliterate with a series of x's — usually used with out <x-ed out the mistake> III. abbreviation 1. cross 2. ex 3. experimental 4. extra

Oxford Reference Dictionary

1. n. (also x) (pl. Xs or X's) 1 the twenty-fourth letter of the alphabet. 2 (as a Roman numeral) ten. 3 (usu. x) Algebra the first unknown quantity. 4 Geom. the first coordinate. 5 an unknown or unspecified number or person etc. 6 a cross-shaped symbol esp. used to indicate position (X marks the spot) or incorrectness or to symbolize a kiss or a vote, or as the signature of a person who cannot write. 2. symb. (of films) classified as suitable for adults only. Usage: Formerly used in the UK to indicate that persons under 18 would not be admitted; it was replaced in 1983 by 18, but is still used in the US.

Webster's 1913 Dictionary

X X ([e^]ks). X, the twenty-fourth letter of the English alphabet, has three sounds; a compound nonvocal sound (that of ks), as in wax; a compound vocal sound (that of gz), as in example; and, at the beginning of a word, a simple vocal sound (that of z), as in xanthic. See Guide to Pronunciation, [sect][sect] 217, 270, 271. Note: The form and value of X are from the Latin X, which is from the Greek [Chi], which in some Greek alphabets had the value of ks, though in the one now in common use it represents an aspirated sound of k.

Moby Thesaurus

Calvary cross, Christogram, Decalogue, Greek cross, Jerusalem cross, John Hancock, Latin cross, Maltese cross, Russian cross, T, Ten Commandments, ankh, autograph, avellan cross, chi, chi-rho, christcross, cipher, countermark, countersign, countersignature, counterstamp, crisscross, cross, cross ancre, cross botonee, cross bourdonee, cross fitche, cross fleury, cross formee, cross fourchee, cross grignolee, cross moline, cross of Cleves, cross of Lorraine, cross patee, cross recercelee, cross-crosslet, crossbones, crosslet, crucifix, cruciform, crux, crux ansata, crux capitata, crux decussata, crux gammata, crux immissa, crux ordinaria, dagger, decade, decagon, decagram, decahedron, decaliter, decameter, decare, decastere, decastyle, decasyllable, decemvir, decemvirate, decennary, decennium, decigram, deciliter, decimeter, decurion, device, endorsement, ex, exing, fork cross, gammadion, hand, initials, inverted cross, long cross, mark, mark of signature, monogram, papal cross, pectoral cross, potent cross, rood, saltire, seal, sigil, sign manual, signature, signet, subscription, swastika, tau, ten, tenner, trefled cross, visa, vise, voided cross

Moby Thesaurus

dark horse, enigma, frontier, frontiers of knowledge, matter of ignorance, mistake, mystery, n, puzzle, riddle, sealed book, terra incognita, the incalculable, the strange, the unfamiliar, the unknowable, the unknown, unexplored ground, unexplored territory, unknown quantity, z