business
US /ˈbɪz.nɪs/
UK /ˈbɪz.nɪs/

1.
an organization or economic system where goods and services are exchanged for money
:
•
He started his own business last year.
•
The company is a large international business.
2.
the amount of work done by a business
:
•
Business was slow during the holidays.
•
We've had a lot of new business this month.
3.
a person's regular occupation, profession, or trade
:
•
What's your line of business?
•
He's in the business of selling cars.
4.
a person's concern or responsibility
:
•
That's none of your business.
•
I'm here on official business.