glass-half-full

• glass half full

From the expression Is the glass half empty or half full?, the answer to which is said to determine whether a person is optimistic or pessimistic.

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glass-half-full (not comparable)

1. (idiomatic, of a person) optimistic
   • 2008, Megan Frost, Common Sense of a Different Kind: Matter-Of-Fact Thoughts on Women and Dating:

     Normally she is an extremely positive, glass half-full sort of girl, someone who can find the silver lining in any situation. However, when it came to her breakup, she refused to see the many positive things that could come from it...

• glass-half-empty