Someone like Niccolò Machiavelli: a Machiavellian person

A pleonastic but common variant of ATM

Capable of being read by a machine; especially by a computer system.

To fire a machine gun / To shoot (people, etc.) with a machine gun

(nonstandard) A clothes dryer.

Divination by interpreting swords, daggers and knives. This was popular in Scotland where on July 31st it was performed to predict the deaths and marriages of the following year.

Any sabre-toothed animal of the subfamily Machairodontinae

(paleontology) A fossil form of segmented (annelid) worm, of the class Machaeridia, that had a scaly armour of mineralised plates

plural of machaeridian

A sound recording device most commonly used to record speech for later playback or to be typed into print.