Found 2 items, similar to brain-teaser.
English → English (WordNet) Definition: brain-teaser brain-teaser n : a difficult problem [syn: riddle, conundrum, enigma]
English → English (gcide) Definition: brain-teaser brain-teaser \brain-teaser\ n. a difficult problem. Syn: riddle, conundrum, enigma. [WordNet 1.5]