Dial in Definition 1 of 3Pro Tip 1/3Precise Adjustment Used when making specific changes to improve performance. The mechanic dialed in the engine for optimal power. Pro Tip 2/3Technical Context Often used in technical or mechanical settings. She dialed in her telescope to see the stars more clearly. Pro Tip 3/3Optimization Process Implies a process of trial and error to get things just right. We'll need to dial in the recipe before the restaurant opens.