1. Of weather, to become clear or fair. There are going to be thunderstorms in the morning, but it should fair off by midday.
2. To make something smooth or flush to a surface. You can use a belt sander to fair off the bumps and blemishes after welding. Today we'll be learning how to fair off the seams on the hull of the boat we're building.
3. To get along; to fare in some way. Usually used in a comparison between two different situations or environments. ("Fair" in this usage is a misspelling of "fare.") I hope he fairs off better in this new job than he did in his last one. The judge agreed that the defendant would fair off better in rehab than in prison.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.