'Modus operandi' definitions:

Definition of 'modus operandi'

From: WordNet
noun
An unvarying or habitual method or procedure [syn: routine, modus operandi]

Definition of 'Modus operandi'

From: GCIDE
  • Modus operandi \Mo"dus op`er*an"di\[L.], manner of operating. Often abbreviated to MO [1913 Webster]

Synonyms of 'modus operandi'

From: Moby Thesaurus