1. something that has been achieved successfully, especially with effort, skill, or courage
2. the successful completion of something
3. a skill or ability in a particular area

Examples

• Graduating from college was her greatest accomplishment.
• The team celebrated the accomplishment of their project goals.
• Learning three languages is quite an accomplishment.
• The accomplishment of the mission required careful planning.
• Playing piano is one of his many accomplishments.
• She felt proud of her academic accomplishments.
• The bridge’s construction was a remarkable engineering accomplishment.