What term describes the ability of an instrument to display values that are true to reality?

In metrology and instrumentation, 'accuracy' specifically defines how close a measured value is to the true, real-world value. If a radio is transmitting exactly 100 watts and the meter reads 100 watts, the instrument is highly accurate. The other terms describe different qualities of measurement. 'Precision' refers to repeatability—getting the exact same reading multiple times, even if that reading is wrong. 'Resolution' is the smallest increment the instrument can display, and 'stability' is the instrument's ability to maintain its performance over time.