Microexpression

//ˌmaɪkɹəʊ.ɪkˈspɹɛʃən// noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    A fleeting, involuntary facial expression that may reveal private thoughts or emotions.

Etymology

From micro- + expression.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.