Definitions

1. adjective

firm in purpose or will; resolute

“She was a stanch supporter of the cause and attended every rally.”

2. verb

to stop or prevent (a flow or leak) by applying pressure or a seal

“The plumber had to stanch the leak before it caused any further damage.”

3. noun

a person who is a loyal supporter or adherent of a person, institution, or party

“He was a stanch member of the club and helped organize the annual charity event.”

4. noun

the main part or mass of something, especially a body of water

“The stanch of the lake was teeming with fish.”