Definition of "fastidious" in English

adjective

1. Excessively particular, demanding, or fussy about details, especially about tidiness and cleanliness.

2. Overly concerned about tidiness and cleanliness.

3. Difficult to please; quick to find fault.

4. (microbiology, of a microorganism) Having precise requirements for nutrition and environment (chemical and physical); especially, being difficult to culture because of those requirements.

   • fastidious organism
   • fastidious species