1. people who climb to the summit of a mountain
2. participants in a summit meeting or conference

Examples

• The summiteers reached the peak of Mount Everest after weeks of preparation.
• Experienced summiteers know the importance of proper equipment and weather conditions.
• The political summiteers gathered to discuss trade agreements.
• World leaders and their advisors served as summiteers at the climate conference.
• The exhausted summiteers celebrated their successful ascent.
• International summiteers worked late into the night to reach a compromise.