STEALTH

I. noun Etymology: Middle English stelthe; akin to Old English stelan to steal Date: 13th century 1. theft , something stolen, the act or action of proceeding furtively, secretly, or imperceptibly , the state of being furtive or unobtrusive, an aircraft-design characteristic consisting of oblique angular construction and avoidance of vertical surfaces that is intended to produce a very weak radar return, II. adjective Date: 1987 intended not to attract attention ; ~y