D defs.my
Entry 2 senses Webster, 1913

Conundrum

/kən-ŭn'-drəm/ · Co·nun·drum · IPA /kəˈnʌn.dɹəm/
01 n. A kind of riddle based upon some fanciful or fantastic resemblance between things quite unlike; a puzzling question, of which the answer is…
  1. 1.
    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.
    “Or pun ambiguous, or conundrum quaint.” — J. Philips.
  2. 2.
    A question to which only a conjectural answer can be made.
    “Do you think life is long enough to let me speculate on conundrums like that?” — W. Black.