Definitions

unknown

[uhn-nohn] / ʌnˈnoʊn /

ADJECTIVE

obscure, mysterious

Synonyms

STRONGEST

anonymous exotic foreign nameless new remote strange uncharted undiscovered unexplained unexplored unfamiliar unidentified unnamed unrecognized

STRONG

X 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

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.

"With an Ajax 2 package of upgrades now in development at an unknown cost, the PAC awaits to see, more in hope than expectation, whether these endeavours will succeed," the report states.

From BBC • Jun. 6, 2026

What worried him was the unknown scale of data centers.

From Salon • Jun. 6, 2026

The poems remain resistant, as they must; but their resistance now carries the force of address, a bottle sent out from wreckage toward an unknown reader.

From The Wall Street Journal • Jun. 5, 2026

How can you plan for such an unknown?

From MarketWatch • Jun. 3, 2026

It smelled of mold, was redolent of antique paper and bindings, and was permeated with a perennial gray cloud of an unknown origin.

From "Endgame" by Frank Brady

Vocabulary lists containing unknown

Operations and Algebraic Thinking

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

unknown

Example Sentences

Related Words

Vocabulary lists containing unknown

Operations and Algebraic Thinking