Definitions

1. noun

A person or thing that sustains something, especially a living thing, with food, money, etc.

“The artist relied on her patron as a sustainer during her early years.”

2. noun

A device or mechanism that provides a steady flow of something, such as electricity or water.

“The wind turbine acts as a sustainer for the small village.”

3. noun

A person who provides financial support to someone or something.

“Her husband is the main sustainer of their family’s business.”