Someone who is optimistic is hopeful about the future or the success of something in particular. The President says she is optimistic that an agreement can be worked out soon Michael was in a jovial and optimistic mood. pessimistic + optimistically op·ti·mis·ti·cal·ly Both sides have spoken optimistically about the talks
expecting the best in this best of all possible worlds; "in an optimistic mood"; "optimistic plans"; "took an optimistic view