Calibration is the process of adjusting and fine-tuning a measuring instrument to ensure its accuracy. This involves comparing the instrument's measurements to a known standard and making necessary adjustments. For example, a thermometer may be calibrated using a temperature standard to ensure it provides accurate readings. Regular calibration is essential in various fields, including science, engineering, and medicine, to maintain the reliability of measurements. Instruments like scales, pressure gauges, and voltage meters require periodic calibration to ensure they function correctly and provide trustworthy data for decision-making and analysis.