1 in an acceptable way; in a way that treats people equally or according to the law, rules, etc 公正;公平:
I felt that the teacher didn't treat us fairly.我觉得老师对我们不公平。 [OPP] unfairly 反义词为unfairly
2 quite, not very 相当:
He is fairly tall.他个子相当高。☞Look at the note at rather. 参看rather的注释。