mysterious
adjective
mys·te·ri·ous
mi-ˈstir-ē-əs 
1
a
: of, relating to, or constituting mystery
the mysterious ways of God
b
: exciting wonder, curiosity, or surprise while baffling efforts to comprehend or identify : mystifying
heard a mysterious noise
a mysterious stranger
a mysterious plane crash
a mysterious illness
2
: stirred by or attracted to the inexplicable
… to help a mysterious wizard … ward off the end of the world with blood sacrifices.—
Robert Houston
Robert Houston
mysteriousness
noun
Synonyms
Examples of mysterious in a Sentence
the mysterious ways of nature
We heard a mysterious noise outside our tent.
He died under mysterious circumstances.
A mysterious illness has been spreading through the city.
There's something mysterious about that old woman.
Her behavior was very mysterious.
Recent Examples on the Web
The groundbreaking find, the researchers claim, could reshape our understanding of the universe and its most powerful and mysterious signals.
—Eric Lagatta, USA TODAY, 27 Jan. 2025
Several years later, Hoffa disappeared under mysterious circumstances and was never seen again.
—David Wharton, Los Angeles Times, 27 Jan. 2025
During last night's episode of Collison, AEW dropped a big hint that its mysterious and undefeated superstar Hologram will soon return.
—Joel Thayer, Newsweek, 26 Jan. 2025
What makes the birth mysterious is that the tank is home to two female sharks who haven't been in contact with a male in over three years.
—Aliza Chasan, CBS News, 26 Jan. 2025
See all Example Sentences for mysterious 
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Eric Lagatta, USA TODAY, 27 Jan. 2025
Several years later, Hoffa disappeared under mysterious circumstances and was never seen again.
—David Wharton, Los Angeles Times, 27 Jan. 2025
During last night's episode of Collison, AEW dropped a big hint that its mysterious and undefeated superstar Hologram will soon return.
—Joel Thayer, Newsweek, 26 Jan. 2025
What makes the birth mysterious is that the tank is home to two female sharks who haven't been in contact with a male in over three years.
—Aliza Chasan, CBS News, 26 Jan. 2025
See all Example Sentences for mysterious
Dictionary Entries Near mysterious
Cite this Entry
“Mysterious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mysterious. Accessed 30 Jan. 2025.
Copy CitationKids Definition
mysterious
adjective
mys·te·ri·ous
mis-ˈtir-ē-əs
: containing, suggesting, or presenting a mystery
mysterious noises
also
: difficult or impossible to understand
the mysterious ways of nature
mysteriously
adverb
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