American Heritage Dictionary
(1)
Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
(3)
Elsewhere on the web
Even Simon Cowell, known for his acerbity on contestants, was clearly floored by the performance of this never-been-kissed, 47-year-old woman.
He has the speech inflections, the facial expressions and even looks a bit like the thirtysomething Clough of the early 70s - but the mix of humour and acerbity is not quite there.— Culture | guardian.co.uk
But where is irony, acerbity, naughtiness which is required for Higgins?— Entertainment Weekly's PopWatch

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