Dictionary.com
Thesaurus.com
Synonyms

brain-teaser

British  

noun

  1. informal a difficult problem

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

In the lab, each person attempted to solve a series of brain teaser puzzles, with three minutes allotted per puzzle.

From Science Daily • Feb. 15, 2026

But we didn’t flock to the original story for a brain teaser.

From Salon • Feb. 2, 2024

It’s an understandable trait, considering he is generally smarter than everyone else, but it’s ill-advised when a heated situation sometimes calls not for a brain teaser, but common sense.

From Los Angeles Times • Jan. 27, 2022

The footage, viewed more than 21 million times, garnered thousands of comments from people who appreciated the brain teaser.

From Fox News • Dec. 3, 2021

He was taking my metamorphosis as a brain teaser, like the ones in the back of his sci-fi magazines.

From "Middlesex: A Novel" by Jeffrey Eugenides

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "brain-teaser" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com