radar

noun

object detection system based on radio waves

Wiktionary

Pronunciation: /ˈɹeɪdɑː/ / /ˈɹeɪˌdɑɹ/

noun

Etymology: Etymology tree Latin radiusder. English radio- Proto-Indo-European *kʷelh₁-der. Ancient Greek τῆλε (têle)lbor. French télé- Proto-Indo-European *gerbʰ- Proto-Hellenic *grə́pʰō Ancient Greek γράφω (gráphō) Ancient Greek -γράφος (-gráphos)bor. Latin -graphuslbor. French -graphe French télégraphebor. English telegraph Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ia Old French -ieder. Middle English -ie Middle English -y English -y English telegraphy English radiotelegraphyclip. English radio Proto-Indo-European *de Proto-Indo-European *-h₁ Proto-Indo-European *déh₁ Proto-Italic *dē Latin dē Latin dē- Proto-Indo-European *(s)teg-der. Proto-Italic *tegō Latin tegō Latin dētegō Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tio Latin dētēctiōder. Latin dētēctiōnembor. English detection Proto-Indo-European *h₂ent- Proto-Indo-European *-s Proto-Indo-European *h₂énts Proto-Indo-European *-i Proto-Indo-European *h₂énti Proto-Germanic *andi Old English and Middle English and English and Proto-Indo-European *(H)rek-der. Proto-Celtic *reketi Gaulish *rekosbor.? Proto-Indo-European *h₃reǵ-der. Proto-Germanic *rinkanąder. Proto-Germanic *rankaz Frankish *rankbor.? Vulgar Latin *rencus Old French reng Proto-Italic *-āzi ▲ Latin -ereinflu. Latin -āre Old French -ier Old French rengierbor. Middle English rengen English range Proto-Germanic *-ungō Old English -ung Middle English -ynge English -ing English ranging English RADAR English radar The noun is derived from RADAR by anacronymic evolution. RADAR is an acronym of ra(dio) d(etection) a(nd) r(anging) which was coined by Lieutenant-Commander Samuel M. Tucker and Lieutenant-Commander F. R. Furth of the United States Navy in November 1940. The verb is probably derived from the noun.

In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves (usually microwaves) which are sent towards the object and which reflect off its surfaces; also, the field of study of this method.
“They were able to find the enemy fleet using radar.”
“Although operational environments profoundly differ, both kinds of autonomous vehicles, groundcraft and aircraft, will still rely on conceptually the same sorts of sensors — cameras, radar and lidar — to perceive surroundings in real time.”
In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves (usually microwaves) which are sent towards the object and which reflect off its surfaces; also, the field of study of this method.
In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves (usually microwaves) which are sent towards the object and which reflect off its surfaces; also, the field of study of this method.
“The Ministry of Defence funded the development of an entirely new radar and improved avionics.”
“Evidence as to the audio monitor's reading is required to prove the [police] officer used the radar unit properly, and must be shown in order to secure a conviction for speeding when using radar.”
In full primary radar: a method of detecting a distant object and determining its position, velocity, or other characteristics by analysing radio waves (usually microwaves) which are sent towards the object and which reflect off its surfaces; also, the field of study of this method.
“Each of these aircraft has been upgraded with a new radar and a more powerful engine.”
“[T]he [depth] bombs must be tied to a grid of listening devices, radars and plotting instruments.”
Often preceded by a descriptive word: a natural (for example, in an animal such as a bat) or human-made detection method based on the analysis of reflected signals other than radio waves, as light waves or sound waves; (countable) an instance of this.
A superior ability to detect something; an awareness, an intuition.
“His sensitive radar for hidden alliances keeps him out of trouble.”
“Stanley: Geez, how'd ya know? / Happy: I got radar or something.”

verb

To use a radar apparatus (noun senses 1, 1.1, or 2) on (someone or something); to scan (someone or something) with, or as if with, radar.
“This was no ordinary signal for help that Baby-John was radaring to outer space, but a call that had to be heeded, for he had just seen two hard guys go down for the final count— […]”
“I don't think men are born on this planet. I think men are born on the planet Pluto and they have them molecularly disassembled and radar-ed to the earth.”