The captain was piqued, but managed to carry on with a pretense of optimism.
’That’s right,’ Dobbs agreed with an optimistic smile, encouraged by Yossarian’s ready grasp of the situation.
The news killed his mother, who just lost her will to live and wasted away and died, which was just fine with his father, who had decided to marry the bad-tempered girl at the A&P if he had to and who had not been optimistic about his chances of getting his wife off the land without paying her some money or flogging her.
Yossarian worked with renewed confidence and optimism.
Major Danby’s effervescent optimism vanished instantly, and he broke out all at once into a bubbling sweat.
There are no more uses of "optimistic" in the book.
Show samples from other sources
I’m optimistic that I’ll get into a good college.
She keeps telling me her chances of dying in a car accident are 1 in 112, but I keep telling her that’s too optimistic if she drinks while intoxicated.