# perplexity

> English word · Noun · IPA /pəˈplɛksɪti/ · frequency rank #80,752

## Definitions
1. The state or quality of being perplexed.
2. Something that perplexes.
3. A measure of how well a probability distribution or model predicts a sample.

## Etymology
From Middle English perplexite, borrowed from Middle French perplexité or post-classical Latin perplexitās, from perplexus (“entangled”). By surface analysis, perplex + -ity.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/perplexity