Plain English Meaning

Weather that is just barely good enough to fly using outside visual references. The clouds are lower than usual and you cannot see as far as you normally would, so the flight is legal but a lot less comfortable and less forgiving of mistakes.

Full Definition

A category of weather conditions in which flight under visual flight rules is still legally permitted, but the ceiling and visibility are near the lower limits of VFR. Specifically, ceilings are 1,000 to 3,000 feet above ground level and/or visibility is 3 to 5 statute miles. Conditions are above the IFR but below the more comfortable VFR or .