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stir1. 1  to move one's hand or an implement continuously or repeatedly through (a liquid or other substance) in order to cool, mix, agitate, dissolve, etc., any or all of the component parts: to stir one's coffee with a spoon. 2  to set in tremulous, fluttering, or irregular motion: A soft breeze stirred the leaves.
agitation. n. 1. a state of excitement, disturbance, or worry. 2. the act of moving something vigorously; the shaking or stirring of something. 3. the act of attempting to stir up public opinion for or against something.