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Definitions

X

[eks] / ɛks /
ADJECTIVE
anonymous
Synonyms
STRONGEST
nameless undisclosed unidentified unnamed unsigned
WEAK
Jane/John Doe bearding incognito innominate pseudo pseudonymous secret such and such unacknowledged unattested unavowed unclaimed uncredited undesignated unspecified what's his/her name whatchamacallit whatsis you know who
Antonyms
STRONGEST
known named
WEAK
identified
ADJECTIVE
nameless
Synonyms
STRONGEST
unheard-of unnamed
WEAK
incognito inconspicuous innominate obscure pseudonymous unacknowledged uncelebrated undesignated undistinguished unfamed unnoted unsung untitled whatchamacallit
Antonyms
WEAK
designated distinguished eminent famous known named prominent renowned
ADJECTIVE
unknown
Synonyms
STRONGEST
anonymous exotic foreign nameless new remote strange uncharted undiscovered unexplained unexplored unfamiliar unidentified unnamed unrecognized
STRONG
alien dark far secret
WEAK
concealed desolate distant far-off faraway hidden humble incog incognito little-known such and such unapprehended unascertained uncelebrated undistinguished unheard-of unnoted unperceived unrenowned unrevealed unsung untold
Antonyms
STRONGEST
common familiar identified known named native normal regular relevant usual
NOUN
check
Synonyms
STRONG
cross dot line mark score sign stroke tick
NOUN
crucifix
Synonyms
STRONG
rood
WEAK
cruciate
NOUN
error
Synonyms
STRONGEST
blunder failure fault flaw glitch inaccuracy lapse miscalculation miscue misdeed mismanagement misstep misunderstanding offense omission sin transgression wrongdoing
STRONG
absurdity boner boo-boo delinquency delusion deviation erratum fall fallacy falsehood falsity goof howler misapprehension misconception miss oversight screamer slight slip solecism stumble trespass untruth
WEAK
bad job faux pas misbelief misjudgment screwup slipup
Antonyms
STRONGEST
accuracy achievement behavior correctness obedience perfection right strength success
STRONG
certainty fact honesty reality surety truth
WEAK
correction validity
NOUN
foobar
Synonyms
WEAK
bar baz corge foo fred garply grault plugh quux qux thud waldo whatchamacallit wombat xyzzy
NOUN
mark
Synonyms
STRONGEST
impression imprint line point record scar score signature spot stain stamp streak symbol
STRONG
autograph blaze blot blotch brand bruise check cross dent dot ink label logo nick pock register representation scratch sign smudge splotch stroke tag ticket trace trademark underlining
WEAK
John Hancock John Henry brand name
Antonyms
STRONG
blank
NOUN
spot
Synonyms
STRONGEST
place point position section setting site situation slot station
STRONG
hangout joint locality locus post sector
NOUN
tick
Synonyms
STRONG
check cross dash flick indication line mark stroke
VERB
mark
Synonyms
STRONGEST
impress seal
STRONG
autograph blaze blot blotch brand bruise chalk check dent dot imprint initial ink inscribe label letter nick pinpoint point print scar score scratch sign smudge splotch stamp streak stroke trace underline write
Antonyms
STRONG
mend smooth

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Asked by MarketWatch, Matt Tuttle, an ETF-industry veteran who shares some of his trades on X, said he “wouldn’t argue” against taking a long position in PMF, the levered Treasury ETF from Direxion.

From MarketWatch • May 5, 2026

The case had alleged that Musk failed to timely disclose his buildup of ownership in the social-media platform he later renamed X.

From The Wall Street Journal • May 5, 2026

After being fired from Kid Cudi's tour, she posted on X to say she wrote Illygal "before you thought immigrant rights were cool".

From BBC • May 5, 2026

Gen X identified with the protagonist 20 years ago.

From Los Angeles Times • May 5, 2026

It had an X in it, like ‘fox,’ you know?

From "Pax" by Sara Pennypacker