1. stock; share
彼は株で失敗した人みたいだ。He looks like someone who failed in stocks.
3. (clump of) roots; plant with attached roots or stem
三年目には株が増え、四年目にはたくさんの花が咲き乱れた。In the third year the plants multiplied, and in the fourth year masses of flowers bloomed.
4. strain (of bacteria, etc.)
5. stock company; corporation; kabushiki kaisha; KK
in company names; written as (株) or ㈱
6. goodwill (of a business); privilege (that comes with a role)
7. reputation; standing; popularity
ずいぶん株を上げてるわ。You've really gone up in everyone's estimation.