adj

• (original sense, archaic or literary) Beautiful, of a pleasing appearance, with a pure and fresh quality.
  "Monday's child is fair of face."
• (nautical, of a wind) Favorable to a ship's course.
  "I shipped with them and becoming friends, we set forth on our venture, in health and safety; and sailed with a fair wind, till we came to a city called Madínat-al-Sín; […]"
• (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.
• (baseball) Between the baselines.

noun

• (obsolete) A woman, a member of the ‘fair sex’; also as a collective singular, women.
  "Love and Hymen, hand in hand, Come, restore the nuptial band! And sincere delights prepare To crown the hero and the fair."
• (obsolete) Fairness, beauty.
  "My decayed fair"
• (obsolete) Good fortune; good luck.
  "Now, fair befall thee, good Petruchio!"

verb

• (transitive) To smoothen or even a surface (especially a connection or junction on a surface).
• (transitive) To bring into perfect alignment (especially about rivet holes when connecting structural members).
• (transitive, art) To make an animation smooth, removing any jerkiness.
  "Since the sequence of data contain sampling noises, the captured motion is not smooth and wiggles along the moving path. There are well-known fairing algorithms in Euclidean space based on difference geometry."
• (transitive) To construct or design with the aim of producing a smooth outline or reducing air drag or water resistance.
  "Two forward cars were provided with the model. One of these (shown detached in Fig. 1) was faired at its after end, with a view to possible reduction of head resistance, and to induce a better flow of air to the propeller."

adv

• (Ireland) Almost; to a great extent but not literally.
  ""I'm fair moidered to know what to do wid him," she confessed to the rosy-cheeked Bridget one day."