have a stake in

Have a share, interest, or involvement in something or someone. For example, Every member had a stake in the business, or She knew that she had a stake in her children's future. This term uses stake in the sense of “something to gain or lose,” as in gambling. [Late 1700s]

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.