means The faculty of seeing — the ability to perceive things with the eyes — or, more loosely, the thing seen and the act of looking at it.

from From Old English 'sihth' or 'gesiht,' meaning the thing seen and the faculty of seeing, built on the same Germanic root that gives us 'see' (Old English 'seon'). It's a close cousin of Dutch 'zicht' and German 'Sicht,' all springing from a Proto-Germanic word for vision. So the word for the act and the word for the eye-power grew up together, the way a glance and the thing glanced at are really one event.