NOUN (1)

1. a follower of Machiavelli's principles;


ADJECTIVE (1)

1. of or relating to Machiavelli or the principles of conduct he recommended;
- Example: "Machiavellian thinking"

The Collaborative International Dictionary of English v.0.48:

Machiavelian \Mach`i*a*vel"ian\, Machiavellian
\Mach`i*a*vel"lian\, a. [From Machiavel (also called
   Machiavelli), an Italian writer, secretary and
   historiographer to the republic of Florence.]
   Of or pertaining to Machiavelli, or to his supposed
   principles for conduct of government, as enunciated in his
   tract The Prince; politically cunning; characterized by
   duplicity, political expediency, unscrupulous cunning, or bad
   faith; crafty.
   [1913 Webster +PJC] Machiavelian

The Collaborative International Dictionary of English v.0.48:

Machiavelian \Mach`i*a*vel"ian\, Machiavellian
\Mach`i*a*vel"lian\, n.
   One who adopts the principles of Machiavelli; a cunning and
   unprincipled politician.
   [1913 Webster] Machiavelism

WordNet (r) 3.0 (2006):

Machiavellian
    adj 1: of or relating to Machiavelli or the principles of
           conduct he recommended; "Machiavellian thinking"
    n 1: a follower of Machiavelli's principles