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re·trace / rēˈtrās/ • v. [tr.] go back over (the same route that one has just taken): he began to retrace his steps to the parking lot. ∎  discover and follow (a route or course taken by someone else): I've tried to retrace some of her movements. ∎  trace (something) back to its source or beginning: I wanted to retrace a particular evolutionary pathway. ∎  trace (lines of drawing or writing) again.