1. a person who tends to see the worst aspect of things or believe that the worst will happen

Examples

• My brother is such a pessimist that he always expects the worst outcome.
• The pessimist in the group predicted the project would fail from the start.
• She’s not being realistic; she’s just being a pessimist about her chances.
• Even when things go well, the pessimist finds something to worry about.
• Don’t be such a pessimist – there’s still hope for success.
• The pessimist saw the glass as half empty, while others saw opportunity.