Definition
In aviation, 'glass' is shorthand for a flight deck where flight, navigation, and engine information is presented on electronic display screens rather than on traditional mechanical instruments with moving needles and dials. A 'glass cockpit' typically uses one or more large LCD screens to show attitude, airspeed, altitude, heading, navigation, and engine data in an integrated digital format.
Plain English
When pilots say an aircraft has 'glass,' they mean the cockpit uses computer screens to show flight information instead of the older round dial-and-needle gauges.
Context Anchor
Seen in discussions of newer aircraft panels, glass cockpits, and electronic flight displays.
Derivation
The term comes from the literal glass face of the LCD screens that replaced the round mechanical instruments. The screens themselves are glass, so pilots began calling these cockpits 'glass cockpits' — and over time 'glass' became shorthand for the whole concept.
Why Pilots Care
Glass displays combine many instruments into one easy-to-scan view, increasing situational awareness, but pilots must master mode awareness to prevent misinterpretation during flight.
Intuition Check
Glass does not mean the window material here. It means the airplane’s screen-based instrument panel or display system.
Example Sentence 1
She trained on steam gauges first, then transitioned to glass when she moved into the Cirrus.
Example Sentence 2
Transitioning pilots must practice scanning the glass displays during instrument approaches.