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
Sometimes an oven is like that mysterious black box on a magician's stage where odd things go in, and something far more delightful comes out.
—Sheri Castle, Southern Living, 7 Aug. 2025
Things took a turn after the former couple found their dog Musso chewing on a mysterious object.
—Daysia Tolentino, EW.com, 7 Aug. 2025
As the stakes rise inside and outside the family, a mysterious new threat emerges…one that could unravel the Russos forever.
—Katie Campione, Deadline, 7 Aug. 2025
At the end of the first season that released back in 2022, Wednesday Addams (Jenna Ortega) discovered that Tyler Galpin (Hunter Doohan) is the monster, known as a Hyde, behind all the mysterious deaths.
—Carly Thomas, HollywoodReporter, 6 Aug. 2025
See All Example Sentences for mysterious
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Sheri Castle, Southern Living, 7 Aug. 2025
Things took a turn after the former couple found their dog Musso chewing on a mysterious object.
—Daysia Tolentino, EW.com, 7 Aug. 2025
As the stakes rise inside and outside the family, a mysterious new threat emerges…one that could unravel the Russos forever.
—Katie Campione, Deadline, 7 Aug. 2025
At the end of the first season that released back in 2022, Wednesday Addams (Jenna Ortega) discovered that Tyler Galpin (Hunter Doohan) is the monster, known as a Hyde, behind all the mysterious deaths.
—Carly Thomas, HollywoodReporter, 6 Aug. 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 19 Aug. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share