Brain-teaser

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  brain-teaser \brain-teaser\ n.
     a difficult problem.
  
     Syn: riddle, conundrum, enigma.
          [WordNet 1.5]



From WordNet (r) 2.0 [wn]:

  brain-teaser
       n : a difficult problem [syn: {riddle}, {conundrum}, {enigma}]