acting in a just and honest way; in accordance with justice or the rules (of a game etc)
impartial, unprejudiced
Cases of word usage
1) a person having fair skin and yellow hair (blond)
2) a covered shelter where goods are sold at a market or a fair (booth)
3) the quality of being right and fair (justice)
4) a shape or area with four equal sides and for right angles; the result when a number is multiplied by itself; fair and honest (square)
5) not fair or just (unfair)