WordWeb Online

1. (often followed by 'for') ardently or excessively desirous
   "avid for adventure"; "an avid ambition to succeed"; "the esurient eyes of an avid curiosity";
   - devouring, esurient, greedy
    
2. Marked by active interest and enthusiasm
   "an avid sports fan";
   - zealous

See also: desirous, enthusiastic, keen, wishful

Encyclopedia: Avid