1. adj. (literary or archaic) Beautiful, of a pleasing appearance, with a pure and fresh quality.
Monday's child is fair of face.
There was once a knight who wooed a fair young maid.
2. adj. Unblemished (figuratively or literally); clean and pure; innocent.
one's fair name
After scratching out and replacing various words in the manuscript, he scribed a fair copy to send to the publisher.
3. adj. Light in color, pale, particularly as regards skin tone but also referring to blond hair.
She had fair hair and blue eyes.
4. adj. Just, equitable.
He must be given a fair trial.
5. adj. Adequate, reasonable, or decent.
The patient was in a fair condition after some treatment.
6. adj. (nautical, of a wind) Favorable to a ship's course.
7. adj. Not overcast; cloudless; clear; pleasant; propitious; said of the sky, weather, or wind, etc.
a fair sky; a fair day
8. adj. Free from obstacles or hindrances; unobstructed; unencumbered; open; direct; said of a road, passage, etc.
a fair mark; in fair sight; a fair view
9. adj. (shipbuilding) Without sudden change of direction or curvature; smooth; flowing; said of the figure of a vessel, and of surfaces, water lines, and other lines.
10. adj. (baseball) Between the baselines.
11. adj. (rugby, of a catch) Taken direct from an opponent's foot, without the ball touching the ground or another player.
12. adj. (cricket, of a ball delivered by the bowler) Not a no-ball.
13. subst. Something which is fair (in various senses of the adjective).
When will we learn to distinguish between the fair and the foul?
14. subst. (obsolete) A woman, a member of the ‘fair sex’; also as a collective singular, women.
15. subst. (obsolete) Fairness, beauty.
16. subst. A fair woman; a sweetheart.
17. subst. (obsolete) Good fortune; good luck.
18. v. To smoothen or even a surface (especially a connection or junction on a surface).
19. v. To bring into perfect alignment (especially about rivet holes when connecting structural members).
20. v. To construct or design a structure whose primary function is to produce a smooth outline or reduce air drag or water resistance.