1.NounAn unsharpened portion of a knife blade at the base of the blade, near the handle of the knife.
2.NounThe region of a knife where such a portion is, or would be if it existed; the region may be arranged as a grip, guard, or combination thereof (a finger choil), or it may be a notch demarking the end of the sharpened edge (a sharpening choil).
"This knife's large finger choil helps compensate for the short handle."
3.NounThe portion where the heel meets the bolster.
4.NounThe indentation of a pocket-knife blade where it joins the tang.