Longman Dictionary of Contemporary English homepage

optimistic

 adjective
     
op‧ti‧mis‧tic
1 believing that good things will happen in the future [≠ pessimistic]
optimistic about
Bankers are cautiously optimistic about the country's economic future.
optimistic (that)
We are still relatively optimistic that the factory can be saved.
Andrew took a more optimistic view.
2 thinking that things will be better, easier, or more successful than is actually possible:
an optimistic estimate
over-optimistic British English
somewhat over-optimistic expectations
WORD FOCUS: happy WORD FOCUS: happy
cheerful behaving in a way that shows you are happy
in a good mood happy at a particular time, and therefore friendly to other people
pleased/glad happy because something good has happened
delighted/thrilled/overjoyed/ecstatic very happy because something good has happened
contented happy with your life
optimistic/positive believing that good things will happen in the future
gleeful/gloating smug happy because something bad has happened to someone else

➔ See also happy
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
 
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