'Thug' definitions:

Definition of 'thug'

From: WordNet
noun
An aggressive and violent young criminal [syn: hood, hoodlum, goon, punk, thug, tough, toughie, strong-armer]

Definition of 'Thug'

From: GCIDE
  • Thug \Thug\ (th[u^]g; 277), n. [Hind. thag a deceiver, robber.]
  • 1. One of an association of robbers and murderers in India who practiced murder by stealthy approaches, and from religious motives. They have been nearly exterminated by the British government. [1913 Webster]
  • 2. An assassin; a ruffian; a rough. "Thugs and midnight rounders." --The Century. [Webster 1913 Suppl.] [1913 Webster]

Synonyms of 'thug'

From: Moby Thesaurus