what achievement is?

Recently in company, where I work, we tryied to introduce new ways of people evaluation. I don't want to go into details, today I want to write down my thoughts on one word, which occurs on each meeting. The word is - achievement.

I noticed that we are using this word on those meetings in so many different contexts, so I proposed, that we should firstly define what achievement is, before we will go further in this discussion. Everyone agreed and each of us had to bring proposition of this definition on next meeting.

I thought about this definition, I even had my own propositions and just few hours before the meeting I sit down and asked myself - what we're trying to do? We want to define word which is already defined? We want to invent a circle once again?