(a)fair, justfree from favoritism or self-interest or bias or deception; conforming with established standards or rules“a fair referee”, “fair deal”, “on a fair footing”, “a fair fight”, “by fair means or foul”
(s)average, fair, mediocre, middlinglacking exceptional quality or ability“a novel of average merit”, “only a fair performance of the sonata”, “in fair health”, “the caliber of the students has gone from mediocre to above average”, “the performance was middling at best”