[ˈɒptɪmɪz(ə)m], (Noun)

Definitions:
- hopefulness and confidence about the future or the success of something
(e.g: the talks had been amicable and there were grounds for optimism)

- the doctrine, especially as set forth by Leibniz, that this world is the best of all possible worlds


Phrases:

Origin:
mid 18th century: from French optimisme, from Latin optimum ‘best thing’ (see optimum)