mo·dus ope·ran·di 
/ˌmoʊdəsˌɑ:pəˈrændi/ noun
/ˌmoʊdəsˌɑ:pəˈrændi/ noun [singular] formal : a usual way of doing something ; especially : the usual way that a particular criminal performs a crime
▪ the murderer's modus operandi ◊Modus operandi is a Latin phrase that means “method of operation” in English. —called also MO
▪ the murderer's modus operandi ◊Modus operandi is a Latin phrase that means “method of operation” in English. —called also MO
