brainteasers From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounA difficult problem or puzzle. Related wordsSynonymsposerspuzzleskakurosudokutriviatangramenigmatologycruciverbalistscavenger huntcrossword puzzlecrosswordsmathsodokuarcadecombinatoricsflashcard References Wiktionary — brainteasers Wikipedia — brainteasers