early 15c., "performance of a task; state of completion," from Old French acomplissement "action of accomplishing," from acomplir (see accomplish). Meaning "thing completed" and that of "something that completes" someone and fits him or her for society are from c. 1600.
1. His function is vital to the accomplishment of the agency's mission.
2. Money will be crucial to the accomplishment of our objectives.
3. The series of paintings is quite an accomplishment.
4. Her technical accomplishment on the piano is startling.
5. I defy you to come up with one major accomplishment of the current Prime Minister.