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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.

What worried him was the unknown scale of data centers.

From Salon • Jun. 6, 2026

If confirmed, this could open the door to finding a wide range of previously unknown quantum phenomena in materials that have been studied for decades.

From Science Daily • Jun. 5, 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

Compared to fumbling around inside a burning building for an unknown exit, this seemed like my best bet.

From "Glitch" by Laura Martin

Vocabulary lists containing unknown

Operations and Algebraic Thinking

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