Plain English Meaning
The weather is good enough — clear enough air and far enough from clouds — that a pilot can fly by looking outside instead of relying on instruments.
Full Definition
Weather conditions equal to or better than the minimum visibility and cloud-clearance requirements specified for visual flight rules in the applicable class of airspace. When these conditions exist, a pilot may fly by visual reference to the ground and horizon rather than relying solely on instruments.
Context Anchor
Seen in weather reports, , , and decisions about whether a can be made under Visual Flight Rules.