Optimistic (adjective)

1. Hopeful and confident about the future or the success of something.
2. Having a tendency to take a favorable or hopeful view.
3. Expecting the best in this most favorable outcome in any situation.

Origin:

Late 18th century: from french optimiste, from latin optimum "best" + -ist.

Examples:

1. He's always been an optimistic person.
2. She was optimistic about the future of the company.
3. I am optimistic that the project will be completed on time.
4. He's optimistic about the chance of success.
5. The outlook for the economy is optimistic.