1A market in the economic/financial sense — a system or arena where goods, services, stocks, or currencies are traded. Used in business contexts: stock market, market research, entering a market, etc.
株式市場が急落してニュースになった。
The stock market plunged and made the news.
新製品を市場に投入する前に市場調査を行った。
We conducted market research before launching the new product.
海外市場への進出を検討している企業が増えている。
More and more companies are considering expanding into overseas markets.
この分野は市場の競争が激しい。
Competition in this market is fierce.
2A street market or marketplace (same as いちば). In this sense, the word is usually read as いちば rather than しじょう.