definition of
antenna

[1] #1 antenna n. [aerial, transmitting aerial] an electrical device that sends or receives radio or television signals. wn

[2] #2 antenna n. [feeler] sensitivity similar to that of a receptor organ; "he had a special antenna for public relations". wn

[3] #3 antenna n. [feeler] one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste. wn