Definition
Aircraft designs that aim to make the aircraft difficult to detect by radar, infrared, or other sensing systems, achieved through specialized shapes, materials (often composites), and coatings that absorb or scatter incoming signals rather than reflecting them back to the source.
Plain English
Aircraft built to be hard for enemy radar and other sensors to spot. The shape and materials are chosen so signals either get soaked up or bounced away in directions that don't return to the sensor.
Context Anchor
Seen in discussions of composite materials, military aircraft, and why some aircraft use nonmetal structures or special surface shapes.
Derivation
Stealth' comes from Old English meaning 'the act of stealing' or moving without being noticed. In modern military use it means avoiding detection — here, avoiding detection by sensors rather than by sight.
Why Pilots Care
Lower detectability increases the chance of mission success and crew survival in hostile airspace.
Intuition Check
Stealth does not mean invisible. In aviation, it means designed to reduce detection, especially by radar.
Example Sentence 1
Composite materials are used extensively in stealth aircraft designs because they reflect far less radar energy than aluminum.
Example Sentence 2
Composites help create stealth aircraft designs by absorbing rather than reflecting radar energy.