What does achievement mean?
The definition of achievement
A*chieve”ment, n.
Etym: [Cf. F. achèvement, E. Hatchment.]

1 The act of achieving or performing; an obtaining by exertion; successful performance; accomplishment; as, the achievement of his object.
2 A great or heroic deed; something accomplished by valor, boldness, or praiseworthy exertion; a feat. [The exploits] of the ancient saints . . . do far surpass the most famous achievements of pagan heroes. Barrow. The highest achievements of the human intellect. Macaulay.
3 (Her.)
An escutcheon or ensign armorial; now generally applied to the funeral shield commonly called hatchment. Cussans.