Meanings
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1
verb
to smile in a smug, condescending, scornful, or self-satisfied way
He began to smirk when his rival gave the wrong answer.
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2
noun
a smile that expresses smugness, condescension, scorn, or self-satisfaction
A faint smirk crossed her face as the plan succeeded.
Thesaurus
Etymology
From Middle English smirken and Old English smearcian, 'to smile,' related to Old English smerian, 'to laugh.' Earlier uses could describe an ordinary smile, but by Early Modern English the word increasingly suggested an affected, mocking, or self-satisfied expression.