Definition of welts:
(n) :
A surname from German.
(n) :
A ridge or lump on the skin, as caused by a blow.
(n) :
(shoemaking) A strip of leather set into the seam between the outsole of a shoe and the upper, through which these parts are joined by stitching or stapling.
(n) :
A strip of material or covered cord applied to a seam or garment edge to strengthen or cover it.
(n) :
A strip, especially one around the edge of something (for example, in some old heraldry).
(n) :
In steam boilers and sheet-iron work, a strip riveted upon the edges of plates that form a butt joint.