i Register
In some senses, mo is marked as slang, obsolete, archaic, UK, colloquial. Watch for register when choosing this word.
name
Abbreviation of Missouri: a state of the United States.
Abbreviation of Philip Morris Companies, now Altria Group.
Initialism of Modern Orthodox.
noun
Initialism of modus operandi.
The Big Man is everywhere. He knows my M.O.!!!!
This was her apartment, I gathered, and he was living here. That was his MO. He would leech onto some girl and eventually move into her home.
Initialism of money order.
Initialism of medical officer.
Initialism of molecular orbital.
adj
Initialism of mesio-occlusal.
Initialism of magnetooptical.