stealth Syllabification: (stealth)Pronunciation: /stelTH/Translate stealth | into German | into Italian | into Spanish Definition of stealth noun cautious and surreptitious action or movement:the silence and stealth of a hungry cat why did you slip away by stealth like this? adjective (chiefly of aircraft) designed in accordance with technology that makes detection by radar or sonar difficult:a stealth bomberOrigin: Middle English (in the sense 'theft'): probably representing an Old English word related to steal, + -th2stealth in other Oxford dictionaries Definition of stealth in the British & World English dictionary