Is cursory a synonym of avid?

No, "cursory" is not a synonym of "avid." They have opposite meanings:

* Cursory: Superficial, hasty, or perfunctory. It suggests a quick, incomplete look or examination.

* Avid: Enthusiastic, eager, and passionate. It suggests a strong interest and desire.

Here are some examples:

* Cursory: "He gave the book a cursory glance before putting it down."

* Avid: "She is an avid reader, devouring books every chance she gets."

Antonyms of "cursory" include: thorough, meticulous, detailed, careful.

Synonyms of "avid" include: keen, enthusiastic, passionate, eager, ardent.