Definition of: antenna

(an·ten′ə) noun plural an·ten·nae (an·ten′ē) for def.
1, an·ten·nas for def.
2.
1. Entomol. One of the paired, lateral, movable, jointed appendages on the head of an insect or other arthropod.
2. Telecom. A system of wires upheld in a vertical or horizontal position by a mast or tower, for transmitting or receiving electromagnetic waves in wireless telegraphy, telephony, and radio.
—cage antenna A radio antenna consisting of several wires arranged in parallel around a series of loops between two uprights and converging at each end. [<NL <L, a yard on which a sail is spread]