Definition of "outbye"

An upcast fault is when the seam is thrown up; to counteract this a "canch" of top stone must be taken down outbye over from the fault, and a "canch" of bottom stone taken up inbye over from the fault, then level up to the bottom of your "canch" at the foreside of the hitch outbye over until you have a regular gradient to the seam on the hitch.

1879, William Bailes, Student's Guide to the Principles of Coal & Metal Mining, page 17