quality or fact or degree of being visible; perceptible by the eye or obvious to the eye
"low visibility caused by fog"
degree of exposure to public notice
"that candidate does not have sufficient visibility to win an election"
The condition of being visible.
"The fog reduced visibility to just a few meters, forcing drivers to slow down."
In plain English: Visibility is how far you can see clearly through air, fog, rain, or other things that might block your view.
"Heavy fog reduced visibility to just a few feet on the highway, making driving extremely dangerous."
The word visibility comes from Middle French and Late Latin, where it originally described the quality of being able to be seen. It entered English as a direct borrowing that retained this original meaning regarding sight.