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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.
Definition of drift for English Language Learners. : 1  a slow and gradual movement or change from one place, condition, etc., to another. : 2  a large pile of snow or sand that has been blown by the wind. : 3  the general or basic meaning of something said or written.