Definition of "conundrum" []

• A riddle in which a fanciful question is answered by a pun. (noun)
• A paradoxical, insoluble, or difficult problem; a dilemma: "the conundrum, thus far unanswered, of achieving full employment without inflation” ( Arthur M. Schlesinger, Jr.) (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This conundrum is as old as Ardipithicus – 4. 4million years old."
• "More broadly, a conundrum is any problem where the answer is very complex, possibly unsolvable without deep investigation."
• ""We ran into what we called the conundrum," he said."