1. one who wills or determines something by an act of will
Usage: formal
2. one who makes a will or testament
Usage: legal

Examples

• The strong willer refused to give up despite the obstacles.
• As the willer of the estate, she had the right to distribute her assets.
• He was known as a determined willer who always achieved his goals.
• The lawyer met with the willer to discuss the terms of the testament.
• She proved herself a capable willer in times of crisis.