One who follows the political philosophy or ideology of Stalin. Marxist-Leninists believe that Leninism is valid, and countries like the USSR are ready for Socialism (unlike Marx, who would've said otherwise), but there must be rapid growth in this nation (often with grave consequences...) in order to reach Marx's standard and hence rejoin the Orthodox Marxist path.
Maoism, Castroism,
Hoxhaism, and other hardcore Communist ideologies are derived from
M-L.
Most
Communist parties in the UK, like CPGB-ML, are Marxist-Leninist.
Marxism-Leninism is not Stalinism. Stalinism is what killed the people, and it's a way of enforcing
M-L instead of an
ideology in itself. Marxism-Leninism never killed or hurt anybody.