antenna

noun

an·​ten·​na an-ˈte-nə How to pronounce antenna (audio)
plural antennae an-ˈte-(ˌ)nē How to pronounce antenna (audio) or antennas
1
plural antennae : one of a pair of slender, movable, segmented sensory organs on the head of insects, myriapods, and crustaceans see insect illustration
2
: a usually metallic device (such as a rod or wire) for radiating or receiving radio waves
a TV antenna
3
antennae plural : a special sensitivity or receptiveness
… his political antennae proved to be shrewder than ever.Erich Segal
antennal adjective

Did you know?

The Latin word antenna meant “sail yard,” which is the long spar that supports and spreads the sail on a sailing vessel. The Greek word for a sail yard was keraia, but that was only one meaning of this word. The primary meaning was “horn.” The philosopher Aristotle used keraiai to describe the feelers of insects, probably because of their resemblance to the horns of some larger animals. In a Latin translation of Aristotle’s work made during the Renaissance, the word antennae was used for Greek keraiai. In English we still use antennae for insects’ feelers. And now we also use antenna for the metal rods that pick up radio waves and seem to “feel the air” like the antennae of an insect.

Examples of antenna in a Sentence

Recent Examples on the Web
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The array consists of two antenna clusters, located 7 miles (11.5 kilometers) apart at Los Alamos, which allowed the team to create a three-dimensional view of each lightning strike's path. Tereza Pultarova, Space.com, 31 Mar. 2025 Old-fashioned antennas for TVs were highly directional and had to be set up pointing toward the transmitter; the direction in which the antenna was deaf to the signal was called a null. David Hambling, Forbes.com, 27 Mar. 2025 By comparing the data from each antenna, the team was able to reconstruct a three-dimensional image of the lightning, mapping out the path of the bolts. Thomas G. Moukawsher, Newsweek, 21 Mar. 2025 The decline of the bundle has had a deleterious downstream impact on broadcast TV viewing, as only 4% of U.S. homes receive their TV signals exclusively via an antenna/over-the-air setup. Anthony Crupi, Sportico.com, 1 Apr. 2025 See All Example Sentences for antenna

Word History

Etymology

Medieval Latin, from Latin, sail yard

First Known Use

1698, in the meaning defined at sense 1

Time Traveler
The first known use of antenna was in 1698

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Cite this Entry

“Antenna.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antenna. Accessed 17 Apr. 2025.

Kids Definition

antenna

noun
an·​ten·​na an-ˈten-ə How to pronounce antenna (audio)
plural antennae -ˈten-(ˌ)ē How to pronounce antenna (audio) or antennas
1
plural usually antennae : one of a pair of slender movable organs of sensation on the head of an arthropod (as an insect or a crab) that are made up of segments
2
plural usually antennas : a device (as a rod or wire) for sending or receiving radio waves

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