1. An older star that has converted most or all of its store of hydrogen into helium.
2. A star near the end of its lifetime when most of its fuel has been used up.

This period of the star's existence is characterized by loss of mass from its surface in the form of a stellar wind or the ejection of gas off the surface of a star.

Many different types of stars, including our sun, have stellar winds; however, a star's wind is strongest near the end of its existence when it has consumed most of its fuel.