WordWeb Online

1. Characterized by intense emotion
   "ardent love"; "an ardent lover"
   - fervent, fervid, fiery, impassioned, perfervid, torrid
    
2. Characterized by strong enthusiasm
   "ardent revolutionaries"
   - warm
    
3. Glowing or shining like fire
   "from rank to rank she darts her ardent eyes"; "frightened by his ardent burning eyes"

See also: ardently, bright, enthusiastic, passionate

Encyclopedia: Ardent