The definition of a modus operandi is a way of doing something.
(noun)An example of modus operandi is driving on the left side of the road in the US.
See modus operandi in Webster's New World College Dictionary
Origin: L
See modus operandi in American Heritage Dictionary 4
noun pl. mo·di operandi (mōˌdē, -dī) Abbr. MO
Origin:
Origin: New Latin modus operandī
Origin: : Latin modus, mode
Origin: + Latin operandī
Origin: , genitive sing. gerund of operārī, to work
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