what is business exactly?

The New Webster’s Dictionary defines [busi*ness] n. ones regular employment, profession, occupation | ones personal affair, concern, duty | something requiring attention | active selling, transactions | a commercial firm or enterprise.
Ultimately, isn’t Business far more complicated than this? Don’t we have a much higher regard for the required investment into whichever Business we chose to be involved in?
We hinge our livelihoods on our…