Definitions

1. noun

a person or organization involved in a conspiracy or other clandestine activity

“The police were investigating the operandi of the notorious crime syndicate.”

2. noun

the method or procedure by which something is done

“The operandi of the new software update was to improve user interface efficiency.”

3. noun

the normal or regular way of doing something

“The operandi of their daily routine was to wake up early and exercise.”