1. in a manner showing courage, bravery, or noble spirit; with fortitude and dignity
Usage: formal or literary
2. in a generous, magnanimous, or kind-hearted manner
Usage: formal or literary

Examples

• She greatheartedly accepted the loss and congratulated her rival.
• He faced the challenge greatheartedly, refusing to show fear.
• The community greatheartedly donated supplies to those in need.
• Despite her own hardship, she greatheartedly helped her neighbors.
• The soldier greatheartedly volunteered for the dangerous mission.
• They greatheartedly forgave those who had wronged them.