antenna in WordNet English dictionary

1. an electrical device that sends or receives radio or television signals
   antenna  aerial  transmitting aerial 
   
2. one of a pair of mobile appendages on the head of e.g. insects and crustaceans; typically sensitive to touch and taste
   antenna  feeler 
   
3. sensitivity similar to that of a receptor organ
   "he had a special antenna for public relations"
   antenna  feeler