(~s)
1.
A ~ is an object that is completely round in shape like a ball.
N-COUNT
2.
A ~ of activity or interest is a particular area of activity or interest.
...the ~ of international politics.
...nurses, working in all ~s of the health service.
= field
N-COUNT: usu N of n
3.
A ~ of people is a group of them who are similar in social status or who have the same interests.
...the realities of life outside the government and academic ~s of society.
N-COUNT: usu N of n