a small instrument of steel, sharply pointed at one end, with an eye to receive a thread, -- used in sewing.-see magnetic needle, under magnetic.-a slender rod or wire used in knitting; a knitting needle; also, a hooked instrument which carries the thread or twine, and by means of which knots or loops are formed in the process of netting, knitting, or crocheting.-one of the needle-shaped secondary leaves of pine trees. see pinus.-any slender, pointed object, like a needle, as a pointed crystal, a sharp pinnacle of rock, an obelisk, etc.-to form in the shape of a needle; as, to needle crystals.-to form needles; to crystallize in the form of needles.