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Noun: perplexity  pu(r)'plek-si-tee
  1. Trouble or confusion resulting from complexity
     
  2. (statistics) a measure of how well a probability distribution or model predicts a new sample, with low values corresponding to good prediction

Derived forms: perplexities

Type of: confusedness, confusion, disarray, mental confusion, muddiness

Encyclopedia: Perplexity