- The definition of an antenna is a wire that receives and conducts electromagnetic waves, typically to transmit information.
An example of an antenna is the long thin metal piece extending upward from a car intended to receive radio signals.
- In zoology, an antenna is defined as the long appendage, usually coming in pairs, on the head of an arthropod that is used to sense the environment.
An example of an animal that has an antenna is a fly.
The antenna on a taxi cab.
antenna definition by Webster's New World
- pl. antennae or antennas either of a pair of movable, jointed sense organs on the head of most arthropods, as insects, crabs, or lobsters; feeler
- pl. antennasRadio, TV an arrangement of wires, metal rods, etc. used in sending and receiving electromagnetic waves; aerial
Origin: Classical Latin earlier antemna, sail yard
antenna definition by American Heritage Dictionary
noun pl. an·ten·nae
- a. Zoology One of the paired, flexible, segmented sensory appendages on the head of an insect, myriapod, or crustacean functioning primarily as an organ of touch.b. Something likened to this sensory appendage, as in function or form: sensitive public relations antennae.
- pl. an·ten·nas A metallic apparatus for sending or receiving electromagnetic waves.
Origin: Medieval Latin, from Latin, sail yard, translation of Greek keraia, insect feeler, yardarm.
- an·tenˈnal adjective
antenna - Computer Definition
A device comprising an arrangement of wires, metal rods, and so on for radiating and receiving radio signals.A transmitting antenna converts electrical current to electromagnetic radio waves projected into free space or a waveguide.A receiving antenna converts electromagnetic radio waves into electric current.An antenna commonly performs both transmit and receive functions.The transmitters and receivers used in free space optics (FSO) also can be characterized as antennas. See also free space, FSO, and waveguide.
antenna - Science Definition
- One of a pair of long, slender, segmented appendages on the heads of insects, centipedes, millipedes, and crustaceans. Most antennae are organs of touch, but some are sensitive to odors and other stimuli.
- A metallic device for sending or receiving electromagnetic waves, such as radio waves. Some antennas can send waves in or receive waves from all directions; others are designed to work only in a range of directions.