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Definitions

mystery

[mis-tuh-ree, -tree] / ˈmɪs tə ri, -tri /
NOUN
puzzle, secret
Synonyms
STRONGEST
conundrum enigma problem question riddle secrecy subtlety thriller
STRONG
abstruseness charade chiller cliffhanger crux cryptogram difficulty grabber inscrutability mystification occult oracle perplexity poser puzzlement rebus rune sphinx stickler stumper teaser twister whodunit why
WEAK
brainteaser braintwister closed book inscrutableness mindboggler sixty-four thousand dollar question tough nut to crack
Antonyms
WEAK
known understanding

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.

The signs are anonymous, attributed only to the "Talking Tree Collective", leaving their author a mystery until Niovi came forward.

From BBC • Apr. 7, 2026

There was confusion over which buttons to press as they wrestled with the mystery of how to reload a SmarTrip card—all of it intensified by the prospect of missing their train.

From Slate • Apr. 4, 2026

But the mystery proved too compelling to ignore.

From Science Daily • Apr. 3, 2026

Be it a hoax or an undiscovered species, the mystery and mythology around Bigfoot has captured people's imaginations for decades.

From BBC • Apr. 3, 2026

The smile is supposed to be mysterious, but the painting itself is never a mystery.

From "The Mona Lisa Vanishes" by Nicholas Day

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.