1) N-UNCOUNT Perplexity is a feeling of being confused and frustrated because you do not understand something.

He began counting them and then, with growing perplexity, counted them a second time.

puzzlement, anxiety
2) N-COUNT: usu pl The perplexities of something are those things about it which are difficult to understand because they are complicated.

...the perplexities of quantum mechanics.

difficulty, complexity

English dictionary. 2008.

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  • Perplexity — is a measurement in information theory. It is defined as 2 raised to the power of entropy, or more often as 2 raised to the power of cross entropy. The latter definition is commonly used to compare probability models empirically. Perplexity of a… …   Wikipedia

  • Perplexity — Per*plex i*ty, n.; pl. {Perplexities}. [L. perplexitas: cf. F. perplexit[ e].] The quality or state of being perplexed or puzzled; complication; intricacy; entanglement; distraction of mind through doubt or difficulty; embarrassment;… …   The Collaborative International Dictionary of English

  • perplexity — index cloud (suspicion), complication, confusion (ambiguity), dilemma, doubt (indecision), enig …   Law dictionary

  • perplexity — (n.) c.1300, from L.L. perplexitas, from L. perplexus confused, involved, from per completely + plexus entangled, pp. of plectere to twine (see COMPLEX (Cf. complex) (adj.)) …   Etymology dictionary

  • perplexity — [pər plek′sə tē] n. [ME perplexite < MFr perplexité < LL perplexitas] 1. the condition of being perplexed; bewilderment; confusion 2. pl. perplexities something that perplexes 3. something that is perplexed, or complicated …   English World dictionary

  • perplexity — UK [pə(r)ˈpleksətɪ] / US [pərˈpleksətɪ] noun Word forms perplexity : singular perplexity plural perplexities 1) [uncountable] a confused feeling that you have because you cannot understand something They stared in perplexity at the map. 2)… …   English dictionary

  • perplexity — per|plex|i|ty [ pər pleksəti ] noun 1. ) uncount a confused feeling because you cannot understand something: CONFUSION: They stared in perplexity at the map. 2. ) count usually plural something that makes a subject or situation difficult to… …   Usage of the words and phrases in modern English

  • perplexity — noun 1) he scratched his head in perplexity Syn: confusion, bewilderment, puzzlement, bafflement, incomprehension, mystification, bemusement; informal bamboozlement, discombobulation 2) the perplexities of international relations Syn: complexity …   Thesaurus of popular words

  • perplexity — perplex ► VERB ▪ cause to feel baffled; puzzle greatly. DERIVATIVES perplexity noun (pl. perplexities) . ORIGIN from Latin perplexus entangled …   English terms dictionary

  • perplexity — noun (plural ties) Etymology: Middle English perplexite, from Middle French perplexité, from Late Latin perplexitat , perplexitas, from Latin perplexus Date: 14th century 1. the state of being perplexed ; bewilderment 2. something that perplexes… …   New Collegiate Dictionary

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