Simple Definition of brainteaser

from our Learner's Dictionary

brainteaser

noun

ˈbreɪnˌtiːzɚ How to pronounce brainteaser (audio)
plural brainteasers
: a puzzle that is difficult to figure out or solve

Cite this Entry

“Brainteaser.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/brainteaser. Accessed 30 Apr. 2026.

Copy Citation

More from Merriam-Webster on brainteaser

Thesaurus: All synonyms and antonyms for brainteaser

Last Updated: - Entry added

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of interlocutor

See Definitions and Examples »

Popular in Grammar & Usage

See More

More Commonly Mispronounced Words

5 Verbal Slip Ups and Language Mistakes

Is that lie 'bald-faced' or 'bold-faced'?

The Difference Between 'i.e.' and 'e.g.'

Why is '-ed' sometimes pronounced at the end of a word?
See More

Popular in Wordplay

See More

The Longest Long Words List

9 Other Words for Beautiful

Was 'nervous Nellie' a Real Person?

12 Lovely and Unusual Words for the Natural World

Why do we 'bury the lede?'
See More

Popular

See More

More Commonly Mispronounced Words

The Longest Long Words List

9 Other Words for Beautiful
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
girl-playing-trumpet
Sound Check: A Musical Word Quiz Tune-up your vocabulary
See All