noun Mustela erminea, the ermine or short-tailed weasel, a mustelid native to Eurasia and North America, distinguished from the least weasel by its larger size and longer tail with a prominent black tip.
verb To stitch (edges of relatively thick cloth, fur, etc, for example on either side of a join or tear) together in a way that is invisible from the 'front', by sewing part of the way into and then back out of the thickness of the material from the 'back' side (without the thread going all the way through to the 'front' side of the material).