Achievement n. : The act of achieving or performing; an obtaining by exertion; successful performance; accomplishment; as, the achievement of his object.

Achievement n. : A great or heroic deed; something accomplished by valor, boldness, or praiseworthy exertion; a feat.

Achievement n. : An escutcheon or ensign armorial; now generally applied to the funeral shield commonly called hatchment.

Example:
How come Achievement #78 doesnt work in Achievement Unlocked?

Taxonomy
Academy of Achievement, Main Menu, Oprah Winfrey, Rosa Parks, Willie Mays, American Academy of Achievement, Jonas Salk, Maya Lin, The Academy, students face, face-to-face, leaders, thinkers, pioneers, Achievement, Achiever, Gallery, International Achievement.

Defination from the web:
Achievement: Achiever Gallery ... the 2009 International Achievement Summit. Master the six elements that help drive success. Discover an Academy. mentor with dreams and challenges like your own. ...