1. Unpleasantly sharp, pungent, or bitter to the taste or smell. See Synonyms at bitter.
2. Caustic in language or tone: an acrid political campaign.
[From Latin ācer, sharp (probably modeled on ACID); see ak- in the Appendix of Indo-European roots.]
a·cridi·ty (ə-krĭdĭ-tē), acrid·ness n.
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