B1
treating everyone in the same way, so that no one has an advantage
Dictionary examples:
Let's be fair: you do all the work, I'll take all the credit. (0.0)
A fair game: you do the dishes, I'll supervise. Deal? (0.0)
It's only fair that I sleep while you do homework, right? (0.0)
That's not fair! You always go first! (8.1)
It's not fair to make me do all the work. (13.2)
I can't spend all my time with one child - it wouldn't be fair to the others. (21.4)
a fair trial (27.8)