What does stealth mean?
Stealth is the deliberate practice of acting, moving, or operating in a concealed way so that one avoids notice or detection. The word is especially common in discussions of military aircraft, surveillance, computer technology, espionage, and surveillance systems, but it can describe any discreet activity. Using stealth often implies planning, skill, and an intention to remain unnoticed rather than merely happening to escape observation. The phrase 'stealth technology' refers broadly to systems designed to reduce visibility, sound, electronic emissions, or other traces that could reveal their presence. In everyday contexts, stealth can describe a person moving quietly or pursuing an objective without attracting attention. Although the word's history is connected with theft, its modern associations extend beyond wrongdoing: stealth can suggest caution, secrecy, tactical advantage, or clever concealment. It is useful because it captures not simply being unseen, but the deliberate effort to achieve that result.
nounStealth is the practice of moving, acting, or operating secretly so as to avoid notice or detection. It commonly refers to covert methods used in military, technological, espionage, or everyday contexts.
- Secret, concealed movement or action intended to avoid notice.
- The use of covert methods or technology to avoid detection, especially in military, technological, or espionage contexts.
- The state or condition of being undetected or inconspicuous.
"The aircraft used stealth to approach its target without being detected."
"The scout relied on stealth to move through the camp without alerting the guards."
"The new system offers a stealth mode that reduces the device's visual and electronic signature."
The plural is rare; stealth is normally used as an uncountable noun.
"The two stealths in the story serve very different purposes."
Stealth began as a word for theft, but its modern meaning broadened: it now describes anything designed to pass from view or attention unnoticed.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does stealth come from?
Stealth comes through Middle English from Old English stæl, meaning 'theft,' and is related to the modern English verb steal. Its sense developed from the secrecy associated with taking by stealth toward the broader ideas of concealment and avoiding detection. The same root also appears in words such as stealer and stealage, while stealthy and stealthily were formed more directly from the modern noun.
Related word forms
How stealth is actually used
Stealth is generally neutral in register but often suggests deliberate concealment and a strategic effort to avoid detection. It is normally used as an uncountable noun, although the plural is occasionally used. In phrases such as 'stealth technology' and 'stealth aircraft,' it functions attributively rather than as a conventional adjective.
Easily confused with stealth
Stealth is the manner of acting secretly, whereas a steal is the act of taking something that belongs to someone else.