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n. A riddle in which a fanciful question is answered by a pun.

n. A paradoxical, insoluble, or difficult problem; a dilemma: "the conundrum, thus far unanswered, of achieving full employment without inflation” ( Arthur M. Schlesinger, Jr.)

n. A difficult question or riddle, especially one using a play on words in the answer.

n. A difficult choice or decision that must be made.

n. A kind of riddle based upon some fanciful or fantastic resemblance between things quite unlike; a puzzling question, of which the answer is or involves a pun.

n. A question to which only a conjectural answer can be made.

n. A conceit; a device; a hoax.

n. A riddle in which some odd resemblance is proposed for discovery between things quite unlike, or some odd difference between similar things, the answer often involving a pun.

n. a difficult problem

"This conundrum is as old as Ardipithicus – 4. 4million years old."

problem   

riddle    question    puzzle    enigma    brain-teaser    dilemma   

quandary    riddle    paradox    enigma    dilemma    confusions    facer    underpinnings    poser    knowledgeacross