What does antiradar mean?
"Antiradar" describes anything designed to counteract or evade radar detection — coatings, paints, jammers, shapes, and materials that absorb, deflect, or interfere with radar signals, as well as the aircraft, ships, and vehicles equipped with them. The word combines the Greek-derived prefix "anti-" (against) with "radar," itself a mid-twentieth-century American acronym for "radio detection and ranging." Its natural habitat is technical and military: defense analysts speak of antiradar coatings on stealth aircraft, engineers of antiradar materials, and regulators of civilian antiradar devices used to foil police speed detection. Because radar plays such a central role in modern navigation and surveillance, antiradar technology carries connotations of concealment, electronic warfare, and the ongoing contest between detection and evasion. The term is closely related to "stealth" technology, though it refers more narrowly to defeating radar specifically rather than all forms of detection.
Designed or used to counteract, evade, or interfere with radar detection.
"The submarine's antiradar cladding helped it slip past coastal surveillance arrays."
Frequently hyphenated as "anti-radar"; common in military and engineering writing.
A device, material, or technique used to defeat or evade radar detection.
"Inspectors confiscated several antiradars hidden behind the truck's grille."
Used when referring to multiple antiradar devices; the adjectival sense has no plural.
"The export ban covered both radar units and antiradars."
The word "radar" began life as a classified military acronym — so "antiradar" is literally a countermeasure against a secret code word that outlived its secrecy.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antiradar
The word "antiradar" is formed from the prefix "anti-", borrowed from Greek via Latin, meaning "against" or "opposite," combined with "radar," an English acronym coined in the 1940s from "radio detection and ranging." As radar spread through military and civilian use after World War II, "antiradar" emerged naturally to name the technologies developed to defeat it. Although "radar" is an invented acronym rather than an inherited root, it draws on the Latin "radius" ("ray, spoke"), making words like "radiate," "radial," and "irradiate" distant relatives through that shared source.
How antiradar is actually used
Mostly technical and military in register, appearing in defense, aviation, and engineering contexts. In civilian settings the term often surfaces in discussions of speed-camera or police-radar jammers, which are illegal in many jurisdictions. Often written with a hyphen as "anti-radar," especially in British sources.
Easily confused with antiradar
"Antiradiation" typically refers to weapons or systems that home in on and destroy radiation-emitting sources such as radar sites, whereas "antiradar" describes anything designed to evade or defeat radar detection.