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Definition of perplexity

perplexity

/pɚˈplɛk.sə.ti/
per · plex · i · ty

Adverb:perplexedly
•
Plural:perplexities
•
Adjective:perplexed
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perplexity Lexical Profile

perplexity Game Scores & Validity

• noun

1

An inability to deal with or understand something complicated or unaccountable; a state of mental confusion, bewilderment, or uncertainty.

Example

"She stared at the contradictory instructions in sheer perplexity, unsure of how to proceed."


2

A complicated or baffling situation, problem, or matter that is difficult to resolve.

Example

"The legal scholars spent months untangling the moral and constitutional perplexities of the landmark case."


3

In information theory and natural language processing, a quantitative measurement of how well a probability distribution or language model predicts a sample, where a lower value indicates better predictive accuracy.

Example

"The researchers evaluated the new neural network by measuring its perplexity on an unseen test corpus."

Synonyms
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Antonyms
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• Rhymes for perplexity

Word Origin & Etymology

Borrowed in the late 14th century from Old French perplexite, from Late Latin perplexitatem ('entanglement, confusion'), derived from Latin perplexus ('entangled, involved, confused'), from per- ('thoroughly') and plexus ('interwoven, braided').

Cite this Entry


Wordmom. (2026). Definition of Perplexity. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/perplexity
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