Wordnet 3.0
ADJECTIVE (1)
1. 
 responding to or operating at a wide band of frequencies; 
- Example: "a broadband antenna"[syn: broadband, wideband]
WordNet (r) 3.0 (2006):
wideband
    adj 1: responding to or operating at a wide band of frequencies;
           "a broadband antenna" [syn: broadband, wideband]