Plain English Meaning
Knowing more clearly what is going on around your aircraft because you are pulling together information from several sources at once, instead of relying on just one.
Full Definition
A heightened state of awareness of the flight environment achieved by combining information from multiple sources — including cockpit instruments, electronic displays, traffic and terrain alerting systems, weather data, ATC communications, and outside visual references — so the pilot has a more complete and accurate picture of the aircraft's position, condition, and surroundings than any single source could provide.