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.

"This isn't quite the process that we think is optimal," OpenAI CEO Sam Altman said Friday in a post on X, alongside an explanation of the GPT-5.6 launch.

From Barron's • Jul. 1, 2026

Flack was the older brother of Caroline, the ex-Love Island and X Factor host who was found dead at her home in Stoke Newington, London, on 15 February 2020.

From BBC • Jun. 30, 2026

I asked MarketWatch followers on X, Instagram and WhatsApp over the weekend whether they’d ever taken a “soft” off day, and, across all platforms, the majority said yes.

From MarketWatch • Jun. 30, 2026

The diagnostics division of the Swiss pharma group is launching Axelios 1, a new sequencing product that has a cost and speed advantage over Illumina’s rival product NovaSeq X Plus, the analysts say.

From The Wall Street Journal • Jun. 30, 2026

Sometimes Liyana felt tempted to draw a large X over the pages in her notebooks.

From "Habibi" by Naomi Shihab Nye

X

Example Sentences

Related Words