The Collaborative International Dictionary of English v.0.48:
Bandit \Ban"dit\ (b[a^]n"d[i^]t), n.; pl. Bandits
(b[a^]n"d[i^]ts), or Banditti (b[a^]n*d[i^]t"t[i^]). [It.
bandito outlaw, p. p. of bandire to proclaim, to banish, to
proscribe, LL. bandire, bannire. See Ban an edict, and cf.
An outlaw; a brigand.
No savage fierce, bandit, or mountaineer. --Milton.
Note: The plural banditti was formerly used as a collective
Deerstealers are ever a desperate banditti. --Sir