Plain English Meaning
Paper or digital maps pilots use when navigating by looking outside. They show what's on the ground, where airports are, where airspace begins and ends, and where military aircraft may be training at low altitude.
Full Definition
Aeronautical charts designed for visual navigation by pilots flying under Visual Flight Rules, typically at a scale of 1:500,000. They depict terrain, obstructions, airports, airspace boundaries, navigation aids, and other features needed for pilotage and dead reckoning, and they also show Military Training Routes (MTRs) so pilots can avoid or remain alert in those areas.