To adjust or reset something to the correct measurements or settings again.
From Latin 're-' meaning 'again' and 'calibrate' from the French word 'calibre' (the diameter of a gun barrel). Originally used for adjusting measuring instruments, now applies broadly to resetting anything.
Your phone's compass needs recalibration constantly because Earth's magnetic field shifts—it's why you have to wave your phone around in a figure-8 pattern sometimes!
Complete word intelligence in one call. Free tier — 50 lookups/day.