noun
an inclination to put the most favorable construction on actions and events or to anticipate the best possible outcome
was a practitioner of optimism in his everyday life
Synonyms: Pollyannaism, rose-colored spectacles, sanguineness, sanguinity
Related Word: brightness, buoyancy, happiness; idealism, positivism
Contrasted words: hopelessness; despair, gloom, melancholy; malism; defeatism, fatalism; cynicism
Antonyms: pessimism