enthusiastic; keen; eager; showing great interest in something or desire to do something
"The avid reader finished every book on her shelf within a week."
In plain English: Avid means having a strong and enthusiastic interest in something, like being really into video games or sports.
"She is an avid reader who visits the library every weekend."
Usage: Use avid to describe someone with intense enthusiasm, such as an avid reader who eagerly consumes books. It is often confused with the similar-sounding word avoid, but remember that being avid means you want more of something rather than staying away from it.
The word comes from the French avide, which originated from the Latin avidus meaning "eager" or "greedy." This Latin term is derived from the verb aveō, which means to wish, desire, or crave.