Avid usually means very eager or enthusiastic. If you're an avid reader, it means you read as much as you can, whenever you can.

But this adjective can also mean wanting something so much that you can be thought of as greedy. For example, a person can be avid for success or power. Avid is from French avide, from Latin avidus, from avere "to desire, crave."

Definitions of avid
  1. adjective
    marked by active interest and enthusiasm
    “an avid sports fan”
    synonyms: zealous
    enthusiastic, keen
    having or showing great excitement and interest
  2. adjective
    (often followed by `for') ardently or excessively desirous
    avid for adventure”
    “an avid ambition to succeed”
    “the esurient eyes of an avid curiosity”
    synonyms: devouring, esurient, greedy
    desirous, wishful
    having or expressing desire for something
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