Difference between Mart and Marketplace

Mart

Part of speech: noun

Definition: A market. A bargain. Mart — The god Mars. Battle; contest.

Part of speech: verb

Definition: To buy or sell in, or as in, a mart. To traffic.

Marketplace

Part of speech: noun

Definition: An open area in a town housing a public market.The space, actual or metaphorical, in which a market operates.The world of commerce and trade.

Example sentence: The thing about markets, and I think the thing people don't understand about that, is markets are not kind, but they're very efficient. So when the marketplace determines an inefficiency in the system, it corrects that, and a market system that's left alone will reward good behavior and punish bad behavior.