from
The Collaborative International Dictionary of English v.0.48
Monte \Mon"te\ (m[o^]n"t[asl]), n. [Sp., lit., mountain, hence,
the stock of cards remaining after laying out a certain
number, fr. L. mons, montis, mountain.]
A favorite gambling game among Spaniards, played with dice or
cards.
[1913 Webster]
{three-card monte} a gambling game using playing cards, in
which a dealer shows a bettor three cards face up and
specifies one to be identified, and after the cards are
turned face down and moved around quickly, the bettor must
identify which of the three cards is the specified card.
It is sometimes engaged in by dealers on the streets of a
city, with bets made by passers-by.
[PJC]