Definition of marts:
(n) :
(Canada, US, Philippines, usually only in combination) A shop, a store, a market.
(n) :
A bazaar, fair, market, or marketplace.
(n) :
A head of feeder cattle or fattened cattle (usually the latter).
(n) :
(by extension, the animal or its meat) Salt beef.
(n) :
(obsolete) A bargain.
(v) :
(obsolete, transitive) To buy or sell in, or as in a mart.