Radar

Definition

Radar refers to a detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain.

Parts of Speech

• Noun

Pronunciation

American English

• IPA Pronunciation: /ˈreɪdɑr/
• Respelling: RAY-dahr (with "RAY" as in "ray," and "dahr" as in the British pronunciation of "dar" in "dark")

British English

• IPA Pronunciation: /ˈreɪdɑː/
• Respelling: RAY-dah (with "RAY" as in "ray," and "dah" as in "father")

In both dialects, "radar" is pronounced with the stress on the first syllable, "RAY." The pronunciation features a slight variation in the ending, with the American English having a more pronounced 'r' sound at the end, while British English typically drops the rhoticity in the final syllable.

Etymology

The term "radar" is an acronym, derived from "RAdio Detection And Ranging." Developed during World War II, the technology played a significant role in military strategies.

Derivatives

• Radarman
• Radar-guided
• Radar detector
• Radar image
• Radar system

Synonyms

• Detection system
• Sonar (for underwater applications)
• Radio wave detection

Antonyms

None.

Usage

"Radar" is commonly used in both civilian and military contexts to refer to systems or devices that detect objects or phenomena using radio waves.

Related Terms

• Radio wave
• Antenna
• Echo
• Doppler effect
• Scanner

Detailed Definition

Noun

• An electronic system or device that uses radio waves to detect and locate objects, typically by measuring the reflection of radio waves from their surfaces.
• Example: The airport's radar detected an unidentified aircraft approaching.

• A method or the equipment used to detect distant objects and determine their position, velocity, or other characteristics by analyzing sent and reflected radio waves.
• Example: The ship's radar system was advanced, allowing it to detect even small boats from miles away.

• Figuratively, awareness or insight into a situation or topic.
• Example: The news of the merger was not on anyone's radar until the official announcement.