1.  stock;  share
3.  (clump of) roots;  plant with attached roots or stem
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