An antenna is a feeler found on the head of a bug. You know, the gross, creepy, pointy things they wave around and use as feelers or sensors. An antenna is also a device that sends radio and television signals.

The singular noun antenna is just one of the feelers on a bug’s head — a sensory wand the insect waves around to check out its surroundings. The plural of this antenna is antennae. (Those Greeks and their funny words!) The singular noun antenna is also the thing on top of your television or radio. The plural of this antenna is antennas.

Definitions of antenna
  1. noun
    one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
    synonyms: feeler
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    type of:
    any of various elongated tactile or prehensile flexible organs that occur on the head or near the mouth in many animals; used for feeling or grasping or locomotion
  2. noun
    sensitivity similar to that of a receptor organ
    “he had a special antenna for public relations”
    synonyms: feeler
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    type of:
    sensitiveness, sensitivity
    the ability to respond to affective changes in your interpersonal environment
  3. noun
    an electrical device that sends or receives radio or television signals
    synonyms: aerial, transmitting aerial
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    show 8 types...
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    dipole, dipole antenna
    an aerial half a wavelength long consisting of two rods connected to a transmission line at the center
    directional antenna
    an antenna that transmits or receives signals only in a narrow angle
    nondirectional antenna, omnidirectional antenna
    an antenna that sends or receives signals equally in all directions
    an arrangement of aerials spaced to give desired directional characteristics
    dish, dish aerial, dish antenna, saucer
    directional antenna consisting of a parabolic reflector for microwave or radio frequency radiation
    radio aerial, radio antenna
    omnidirectional antenna comprising the part of a radio receiver by means of which radio signals are received
    television antenna, tv-antenna
    an omnidirectional antenna tuned to the broadcast frequencies assigned to television
    Yagi aerial, yagi
    a sharply directional antenna
    type of:
    electrical device
    a device that produces or is powered by electricity
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