Plain English Meaning

The lowest weather conditions — how far you can see and how low the clouds are — that legally allow you to continue an instrument approach down to landing. If conditions are worse than these limits, you can't land from that approach.

Full Definition

The minimum visibility, runway visual range, and/or ceiling values prescribed for landing a civil aircraft while using an instrument approach procedure. The specific minimums for a given approach are published on the instrument approach chart and depend on the type of approach, the aircraft category, and the equipment in use.