noun
optimism
AHP-tih-miz-uhm/ˈɑːptɪmɪzəm/
Confidence that good things will happen.
Despite the setbacks, she faces the future with optimism.

Etymology
The “best” base originally referred to the philosophical doctrine that this is the best of all possible worlds. That belief broadened into a hopeful outlook and an expectation of good outcomes.
In context
what do I mean by optimism I mean a a positive view of what is possible in the future of what will happen in the future
More examples
- The strong interview fills him with optimism about the job.
- Doctors express cautious optimism about her recovery.
- Your optimism makes me believe our plan can work.
Forms
optimist noun — Someone who generally expects good things to happen.
optimistic adjective — Confident that good things will happen.
Similar words
- hope
- Can express a wish without confidence it will happen.
- confidence
- Can concern abilities or facts, not just favorable outcomes.