1.  newmarket(n = noun.artifact) - a long close-fitting coat worn for riding in the 19th century;
is a kind of coat

2.  newmarket(n = noun.act) boodle, chicago, michigan, stops - a gambling card game in which chips are placed on the ace and king and queen and jack of separate suits (taken from a separate deck); a player plays the lowest card of a suit in his hand and successively higher cards are played until the sequence stops; the player who plays a card matching one in the layout wins all the chips on that card;
is a kind of card game, cards

   A long, closely fitting cloak. [1913 Webster]

newmarket, n. a gambling card-game in which players seek to play cards that match those on the table.

Etymology:
Newmarket in S. England