modus operandi

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method of operation, way of working, usual procedure
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/ˈmɔ.dʊs ɔ.pɛˈran.dɪ/
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A regular way of working or carrying something out, especially a pattern recognizable in a person, organization, or criminal investigation.

Examples

  • Investigatores eundem modum operandi in tribus criminibus invenerunt.
    The investigators found the same method of operation in three crimes.
  • Ille modus operandi omnibus notus erat.
    That method of operation was known to everyone.
  • Ex ipso modo operandi auctor facinoris cognitus est.
    The offender was identified from the method of operation itself.
  • Societas novum modum operandi ad mercatum celerem elegit.
    The company chose a new way of working for a fast-moving market.
  • Duo furta eodem modo operandi coniuncta sunt.
    Two thefts were linked by the same method of operation.

Similar words

ratio operandi
methodus
consuetudo
via agendi
modus agendi
mos
ratio agendi

Meanings

Usage

Use modus operandi when the method is habitual or recognizable, not merely for any one-time action or ordinary plan.

Common mistakes

Eundem modus operandi uses the nominative where Latin needs the accusative, and the plural changes the head noun to modi operandi.

Etymology

New Latin, built from Latin modus, meaning manner or method, and operandī, meaning of working, the genitive gerund of operārī.

FAQ

What does modus operandi mean?

Modus operandi means a usual method of working or a recognizable pattern of action.

Is modus operandi only used for crime?

No. It is common in criminal investigation, but it can also describe business routines, personal habits, and other repeated ways of working.

What is the plural of modus operandi?

The traditional Latin plural is modi operandi, with only modus changing to modi.

Is modus operandi the same as a criminal signature?

Not exactly. In law and investigation, modus operandi is the working pattern used to carry out acts and can help connect them to the same actor.

How is modus operandi pronounced in Latin?

A Classical Latin pronunciation is /ˈmɔ.dʊs ɔ.pɛˈran.dɪ/.

Where does modus operandi come from?

It is New Latin, formed from modus, meaning manner or method, and operandī, meaning of working.

Can modus operandi be abbreviated?

In English, modus operandi is often shortened to M.O. or MO.

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