1. Sharp and harsh, or bitter and not, to the taste; pungent; as, acrid salts.
2. Causing heat and irritation; corrosive; as, acrid secretions.
3. Caustic; bitter; bitterly irritating; as, acrid temper, mind, writing. Acrid poison, a poison which irritates, corrodes, or burns the parts to which it is applied.
Origin: L. Acer sharp; prob. Assimilated in form to acid. See eager.