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
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
As the rest of America adjusts to Homelander’s iron fist, back at Godolkin University, the mysterious new Dean (Hamish Linklater) preaches a curriculum that promises to make students more powerful than ever.
—Tim Lammers, Forbes.com, 16 Sep. 2025
The creepy narrative features Dakota Fanning as a woman who's gifted a mysterious box by a late-night visitor.
—Brian Truitt, USA Today, 16 Sep. 2025
Described as luxurious and mysterious, the jewel tone has universal appeal and a utilitarian characteristic that aligns with industries’ gender-inclusive approach to design.
—Angela Velasquez, Sourcing Journal, 16 Sep. 2025
As the rest of America adjusts to Homelander's iron fist, back at Godolkin University, the mysterious new Dean preaches a curriculum that promises to make students more powerful than ever.
—Billie Melissa, MSNBC Newsweek, 15 Sep. 2025
See All Example Sentences for mysterious
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Tim Lammers, Forbes.com, 16 Sep. 2025
The creepy narrative features Dakota Fanning as a woman who's gifted a mysterious box by a late-night visitor.
—Brian Truitt, USA Today, 16 Sep. 2025
Described as luxurious and mysterious, the jewel tone has universal appeal and a utilitarian characteristic that aligns with industries’ gender-inclusive approach to design.
—Angela Velasquez, Sourcing Journal, 16 Sep. 2025
As the rest of America adjusts to Homelander's iron fist, back at Godolkin University, the mysterious new Dean preaches a curriculum that promises to make students more powerful than ever.
—Billie Melissa, MSNBC Newsweek, 15 Sep. 2025
See All Example Sentences for mysterious
Cite this Entry
“Mysterious.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/mysterious. Accessed 17 Sep. 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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